Problem:
K: 救済 (Angel Relief)
天使の天真さんは、ある街を救うことにした。
この街は南北 $H$ 区画 × 東西 $W$ 区画に分けられた長方形の形をしており、各区画に家がある。
北から数えて $X$ 番目、西から数えて $Y$ 番目の区画を $(X, Y)$ で表す。
区画 $(i, j)$ にある家には $A_{i, j}$ 人の人が住んでいる。
天真さんは、辺が南北または東西に平行または垂直な長方形のエリアを選び、その中に住んでいる人全員を
ひとりずつ
救済する。
天真さんは、考えられるすべての長方形でこの操作を行う。
天真さんが人を救済する回数の合計を求めよ。
入力
1 行目に、整数 $H, W$ が空白区切りで与えられる。
続く $H$ 行のうち $i$ 行目には、整数 $A_{i, 1}, A_{i, 2}, A_{i, 3}, \dots, A_{i, W}$ が空白区切りで与えられる。
出力
天真さんが人を救済する回数の合計を出力せよ。
制約
$H, W$ は $1$ 以上 $500$ 以下の整数
$A_{i, j}$ はすべて $1$ 以上 $9$ 以下の整数である。
入力例1
2 2
1 2
4 8
出力例1
60
例えば、左上を $(1, 1)$、右下を $(2, 2)$ となるように長方形のエリアを選ぶと、そこにいる $15$ 人をひとりずつ救済するので、合計 $15$ 回の救済を行う。
$9$ 通りの長方形のエリアに対して、それぞれ $1, 2, 3, 4, 5, 8, 10, 12, 15$ 回の救済を行うので、合計で $60$ 回である。
入力例2
2 3
1 2 3
4 5 6
出力例2
140

Submitted solutions:

code_snippet: #include <bits/stdc++.h>

using namespace std;

//make -f ../makefile SRC=

/*
3X4 grid consists of 4 horizontal lines and 5 vertical ones
no. of rects = comb(4,2) * comb(5,2) = 6 * 10 = 60

*/


//------------------------------------------------------------------------------
bool DEBUG = false;
const int INF = 1000000000;

const int MAX_N = 500;
static int64_t GRID[MAX_N][MAX_N];
//------------------------------------------------------------------------------
int64_t solve(int M, int N)
{
    int64_t res = 0;
    for (int m=0; m<M; ++m)
        for (int n=0; n<N; ++n)
            res += GRID[m][n] * (m+1)*(M-m) * (n+1)*(N-n);
    return res;
}
//------------------------------------------------------------------------------
int main()
{
    //DEBUG = true;
    //--------------------------------------------------------------------------
    int M, N, num;
    num = scanf("%d %d ", &M, &N);
    for (int m=0; m<M; ++m)
        for (int n=0; n<N; ++n)
            num = scanf("%ld ", &GRID[m][n]);
    printf("%ld\n", solve(M, N));
    //--------------------------------------------------------------------------
    return 0;
}
//------------------------------------------------------------------------------
accuracy: 1
time_ms: 10
memory_kb: 5520
final_rank: 15

code_snippet: #pragma region Macros
 
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,fma,abm,mmx,avx,avx2")
 
#include <bits/extc++.h>
// #include <atcoder/all>
// using namespace atcoder;
using namespace std;
using namespace __gnu_pbds;
 
// #include <boost/multiprecision/cpp_dec_float.hpp>
// #include <boost/multiprecision/cpp_int.hpp>
// namespace mp = boost::multiprecision;
// using Bint = mp::cpp_int;
// using Bdouble = mp::number<mp::cpp_dec_float<256>>;
// Bdouble Beps = 0.00000000000000000000000000000001; // 1e-32
// const bool equals(Bdouble a, Bdouble b) { return mp::fabs(a - b) < Beps; }
 
#define pb emplace_back
#define int ll
#define endl '\n'
// #define unordered_map<int, int> gp_hash_table<int, int, custom_hash> 
 
#define sqrt __builtin_sqrtl
#define cbrt __builtin_cbrtl
#define hypot __builtin_hypotl
 
#define next asdnext
#define prev asdprev
 
using ll = long long;
using ld = long double;
const ld PI = acosl(-1);
const int INF = 1 << 30;
const ll INFL = 1LL << 61;
const int MOD = 998244353;
// const int MOD = 1000000007;
 
const ld EPS = 1e-10;
const bool equals(ld a, ld b) { return fabs((a) - (b)) < EPS; }
 
const vector<int> dx = {0, 1, 0, -1, 1, 1, -1, -1}; // → ↓ ← ↑ ↘ ↙ ↖ ↗
const vector<int> dy = {1, 0, -1, 0, 1, -1, -1, 1};
 
#define EC int
struct Edge {
    int from, to;
    EC cost;
    Edge() : from(-1), to(-1), cost(-1) {}
    Edge(int to, EC cost) : to(to), cost(cost) {}
    Edge(int from, int to, EC cost) : from(from), to(to), cost(cost) {}
    bool operator ==(const Edge& e) {
        return this->from == e.from && this->to == e.to && this->cost == e.cost;
    }
    bool operator !=(const Edge& e) {
        return this->from != e.from or this->to != e.to or this->cost != e.cost;
    }
    bool operator <(const Edge& e) { return this->cost < e.cost; }
    bool operator >(const Edge& e) { return this->cost > e.cost; }
};
 
chrono::system_clock::time_point start;
__attribute__((constructor))
void constructor() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout << fixed << setprecision(10);
    start = chrono::system_clock::now();
}
 
random_device seed_gen;
mt19937_64 rng(seed_gen());
uniform_int_distribution<int> dist_x(0, 1e9);
struct RNG {
    unsigned Int(unsigned l, unsigned r) {
        return dist_x(rng) % (r - l + 1) + l;
    }
    ld Double() {
        return ld(dist_x(rng)) / 1e9;
    }
} rnd;
 
using i64 = ll;
// using i64 = uint64_t;
// bit演算, x==0の場合は例外処理した方がよさそう. 区間は [l, r)
i64 lrmask(i64 l, i64 r) { return (1LL << r) - (1LL << l); }
i64 sub_bit(i64 x, i64 l, i64 r) { i64 b = x & ((1LL << r) - (1LL << l)); return b >> l; } // r溢れ可
i64 bit_width(i64 x) { return 64 - __builtin_clzll(x) + (x == 0); }
 
i64 popcount(i64 x) { return __builtin_popcountll(x); }
i64 popcount(i64 x, i64 l, i64 r) { return __builtin_popcountll(sub_bit(x, l, r)); }
i64 unpopcount(i64 x) { return bit_width(x) - __builtin_popcountll(x); }
i64 unpopcount(i64 x, i64 l, i64 r) { return r - l - __builtin_popcountll(sub_bit(x, l, r)); }
bool is_pow2(i64 x) { return __builtin_popcountll(x) == 1; } // xが負のときは常にfalse
bool is_pow4(i64 x) { return __builtin_popcount(x) == 1 && __builtin_ctz(x) % 2 == 0; }
 
i64 top_bit(i64 x) { return 63 - __builtin_clzll(x);} // 2^kの位 (x > 0)
i64 bot_bit(i64 x) { return __builtin_ctzll(x);} // 2^kの位 (x > 0)
// i64 next_bit(i64 x, i64 k) { return 0; }
// i64 prev_bit(i64 x, i64 k) { return 0; }
// i64 kth_bit(i64 x, i64 k) { return 0; }
i64 MSB(i64 x) { if (x == 0) return 0; return 1LL << (63 - __builtin_clzll(x)); } // mask
i64 LSB(i64 x) { return (x & -x); } // mask
 
i64 countl_zero(i64 x) { return __builtin_clzll(x); }
i64 countl_one(i64 x) {
    i64 ret = 0, k = 63 - __builtin_clzll(x);
    while (k != -1 && (x & (1LL << k))) { k--; ret++; }
    return ret;
}
i64 countr_zero(i64 x) { return __builtin_ctzll(x); } // x==0のとき64が返ることに注意
i64 countr_one(i64 x) { i64 ret = 0; while (x & 1) { x >>= 1; ret++; } return ret; }
 
i64 floor_log2(i64 x) { if (x == 0) return 0; return 63 - __builtin_clzll(x); }
i64 bit_floor(i64 x) { if (x == 0) return 0; return 1LL << (63 - __builtin_clzll(x)); } // MSBと同じ
i64 ceil_log2(i64 x) { if (x == 0) return 0; return 64 - __builtin_clzll(x - 1); }
i64 bit_ceil(i64 x) { if (x == 0) return 0; return 1LL << (64 - __builtin_clzll(x - 1)); }
 
i64 rotl(i64 x, i64 k) { // 有効bit内でrotate. オーバーフロー注意
    i64 w = bit_width(x); k %= w;
    return ((x << k) | (x >> (w - k))) & ((1LL << w) - 1);
}
// i64 rotl(i64 x, i64 l, i64 m, i64 r) {}
i64 rotr(i64 x, i64 k) {
    i64 w = bit_width(x); k %= w;
    return ((x >> k) | (x << (w - k))) & ((1LL << w) - 1);
}
// i64 rotr(i64 x, i64 l, i64 m, i64 r) {}
i64 bit_reverse(i64 x) { // 有効bit内で左右反転
    i64 r = 0, w = bit_width(x);
    for (i64 i = 0; i < w; i++) r |= ((x >> i) & 1) << (w - i - 1);
    return r;
}
// i64 bit_reverse(i64 x, i64 l, i64 r) { return 0; }
 
bool is_palindrome(i64 x) { return x == bit_reverse(x); }
bool is_palindrome(i64 x, i64 l, i64 r) { i64 b = sub_bit(x, l, r); return b == bit_reverse(b); }
i64 concat(i64 a, i64 b) { return (a << bit_width(b)) | b; } // オーバーフロー注意
i64 erase(i64 x, i64 l, i64 r) { return x>>r<<l | x&(1LL<<l - 1); } // [l, r) をカット
 
i64 hamming(i64 a, i64 b) { return __builtin_popcountll(a ^ b); }
i64 hamming(i64 a, i64 b, i64 l, i64 r) { return __builtin_popcountll(sub_bit(a, l, r) ^ sub_bit(b, l, r)); }
i64 compcount(i64 x) { return (__builtin_popcountll(x ^ (x >> 1)) + (x & 1)) / 2; }
i64 compcount2(i64 x) { return compcount(x & (x >> 1)); } // 長さ2以上の連結成分の個数
i64 adjacount(i64 x) { return __builtin_popcountll(x & (x >> 1)); } // 隣接する1のペアの個数
 
i64 next_combination(i64 x) {
    i64 t = x | (x - 1); return (t + 1) | (((~t & -~t) - 1) >> (__builtin_ctzll(x) + 1));
}
 
 
__int128_t POW(__int128_t x, int n) {
    __int128_t ret = 1;
    assert(n >= 0);
    if (x == 1 or n == 0) ret = 1;
    else if (x == -1 && n % 2 == 0) ret = 1; 
    else if (x == -1) ret = -1; 
    else if (n % 2 == 0) {
        assert(x < INFL);
        ret = POW(x * x, n / 2);
    } else {
        assert(x < INFL);
        ret = x * POW(x, n - 1);
    }
    return ret;
}
int per(int x, int y) { // x = qy + r (0 <= r < y) を満たすq
    assert(y != 0);
    if (x >= 0 && y > 0) return x / y;
    if (x >= 0 && y < 0) return x / y - (x % y < 0);
    if (x < 0 && y < 0) return x / y + (x % y < 0);
    return x / y - (x % y < 0); //  (x < 0 && y > 0) 
}
int mod(int x, int y) { // x = qy + r (0 <= r < y) を満たすr
    assert(y != 0);
    if (x >= 0) return x % y;
    __int128_t ret = x % y; // (x < 0)
    ret += (__int128_t)abs(y) * INFL;
    ret %= abs(y);
    return ret;
}
int floor(int x, int y) { // (ld)x / y 以下の最大の整数
    assert(y != 0);
    if (y < 0) x = -x, y = -y;
    return x >= 0 ? x / y : (x + 1) / y - 1;
}
int ceil(int x, int y) { // (ld)x / y 以上の最小の整数
    assert(y != 0);
    if (y < 0) x = -x, y = -y;
    return x > 0 ? (x - 1) / y + 1 : x / y;
}
int round(int x, int y) {
    assert(y != 0);
    return (x * 2 + y) / (y * 2);
}
int round(int x, int y, int k) { // (ld)(x/y)を10^kの位に関して四捨五入
    assert(y != 0); // TODO
    return INF;
}
int round2(int x, int y) { // 五捨五超入 // 未verify
    assert(y != 0);
    if (y < 0) y = -y, x = -x;
    int z = x / y;
    if ((z * 2 + 1) * y <= y * 2) z++;
    return z;
}
// int round(ld x, int k) { // xを10^kの位に関して四捨五入
// }
// int floor(ld x, int k) { // xを10^kの位に関してflooring
// }
// int ceil(ld x, int k) { // xを10^kの位に関してceiling
// }
// int kth(int x, int y, int k) { // x / yの10^kの位の桁
// }
int floor(ld x, ld y) { // 誤差対策TODO
    assert(!equals(y, 0));
    return floor(x / y);
    // floor(x) = ceil(x - 1) という話も
}
int ceil(ld x, ld y) { // 誤差対策TODO // ceil(p/q) = -floor(-(p/q))らしい
    assert(!equals(y, 0));
    return ceil(x / y);
    // ceil(x) = floor(x + 1)
}
int perl(ld x, ld y) { // x = qy + r (0 <= r < y, qは整数) を満たす q
    // 未verify. 誤差対策TODO. EPS外してもいいかも。
    assert(!equals(y, 0));
    if (x >= 0 && y > 0) return floor(x / y)+EPS;
    if (x >= 0 && y < 0) return -floor(x / fabs(y));
    if (x < 0 && y < 0) return floor(x / y) + (x - floor(x/y)*y < -EPS);
    return floor(x / y) - (x - floor(x/y)*y < -EPS); //  (x < 0 && y > 0) 
}
ld modl(ld x, ld y) { // x = qy + r (0 <= r < y, qは整数) を満たす r
    // 未verify. 誤差対策TODO. -0.0が返りうる。
    assert(!equals(y, 0));
    if (x >= 0) return x - fabs(y)*fabs(per(x, y));
    return x - fabs(y)*floor(x, fabs(y));
}
int seisuu(ld x) { return (int)x; } // 整数部分. 誤差対策TODO
int modf(ld x) {
	if (x < 0) return ceill(x);
	else return floorl(x);
}
// 正なら+EPS, 負なら-EPSしてから、文字列に直して小数点以下を捨てる?
int seisuu(int x, int y) {
    assert(y != 0);
    return x / y;
}
int seisuu(ld x, ld y) { // 誤差対策TODO
    assert(!equals(y, 0));
    return (int)(x / y);
}
 
template <class T> pair<T, T> max(const pair<T, T> &a, const pair<T, T> &b) {
    if (a.first > b.first or a.first == b.first && a.second > b.second) return a;
    return b;
}
template <class T> pair<T, T> min(const pair<T, T> &a, const pair<T, T> &b) {
    if (a.first < b.first or a.first == b.first && a.second < b.second) return a;
    return b;
}
 
template <class T> bool chmax(T &a, const T& b) {
    if (a < b) { a = b; return true; } return false;
}
template <class T> bool chmin(T &a, const T& b) {
    if (a > b) { a = b; return true; } return false;
}
template <class T> T mid(T a, T b, T c) { // 誤差対策TODO
    return a + b + c - max({a, b, c}) - min({a, b, c});
}
template <class T> void Sort(T &a, T &b, bool rev = false) { 
    if (rev == false) {  // TODO テンプレート引数
        if (a > b) swap(a, b);
    } else {
        if (b > a) swap(b, a);
    }
}
template <class T> void Sort(T &a, T &b, T &c, bool rev = false) {
    if (rev == false) { 
        if (a > b) swap(a, b); if (a > c) swap(a, c); if (b > c) swap(b, c);
    } else {
        if (c > b) swap(c, b); if (c > a) swap(c, a); if (b > a) swap(b, a);
    }
}
template <class T> void Sort(T &a, T &b, T &c, T &d, bool rev = false) {
    if (rev == false) { 
        if (a > b) swap(a, b); if (a > c) swap(a, c);  if (a > d) swap(a, d);
        if (b > c) swap(b, c); if (b > d) swap(b, d); if (c > d) swap(c, d);
    } else {
        if (d > c) swap(d, c); if (d > b) swap(d, b); if (d > a) swap(d, a);
        if (c > b) swap(c, b); if (c > a) swap(c, a); if (b > a) swap(b, a);
    }
}
 
struct custom_hash {
    static uint64_t splitmix64(uint64_t x) {
        x += 0x9e3779b97f4a7c15;
        x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
        x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
        return x ^ (x >> 31);
    }
 
    size_t operator()(uint64_t x) const {
        static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
        return splitmix64(x + FIXED_RANDOM);
    }
};
 
class Compress {
public:
    int sz = 0;
    // gp_hash_table<int, int, custom_hash> Z, UZ;
    unordered_map<int, int> Z;    // 元の値 -> 圧縮した値
    unordered_map<int, int> UZ;   // 圧縮した値 -> 元の値
 
    Compress(const vector<int> &V, int base = 0) {
        this->sz = base;
        set<int> s(V.begin(), V.end());
 
        for (int x : s) {
            this->Z[x] = this->sz;
            this->UZ[this->sz] = x;
            this->sz++;
        }
    }
    
    Compress(const vector<int> &V1, const vector<int> &V2, int base = 0) {
        this->sz = base;
        vector<int> V3 = V2;
        V3.insert(V3.end(), V1.begin(), V1.end());
        set<int> s(V3.begin(), V3.end());
 
        for (int x : s) {
            this->Z[x] = this->sz;
            this->UZ[this->sz] = x;
            this->sz++;
        }
    }
 
    Compress(const vector<int> &V1, const vector<int> &V2, const vector<int> &V3, int base = 0) {
        this->sz = base;
        vector<int> V4 = V1;
        V4.insert(V4.end(), V2.begin(), V2.end());
        V4.insert(V4.end(), V3.begin(), V3.end());
        set<int> s(V4.begin(), V4.end());
 
        for (int x : s) {
            this->Z[x] = this->sz;
            this->UZ[this->sz] = x;
            this->sz++;
        }
    }
 
    Compress(const vector<int> &V1, const vector<int> &V2,
            const vector<int> &V3, const vector<int> &V4, int base = 0) {
        this->sz = base;
        vector<int> V5 = V1;
        V5.insert(V5.end(), V2.begin(), V2.end());
        V5.insert(V5.end(), V3.begin(), V3.end());
        V5.insert(V5.end(), V4.begin(), V4.end());
        set<int> s(V5.begin(), V5.end());
 
        for (int x : s) {
            this->Z[x] = this->sz;
            this->UZ[this->sz] = x;
            this->sz++;
        }
    }
 
    vector<int> zip(const vector<int> &V) {
        vector<int> ret = V;
        for (int i = 0; i < (int)V.size(); i++) {
            ret[i] = Z[ret[i]];
        }
        return ret;
    }
 
    vector<int> unzip(const vector<int> &V) {
        vector<int> ret = V;
        for (int i = 0; i < (int)V.size(); i++) {
            ret[i] = UZ[ret[i]];
        }
        return ret;
    }
 
    int size() { return sz; }
 
    int encode(int x) { return Z[x]; }
    int decode(int x) {
        if (UZ.find(x) == UZ.end()) return -1; // xが元の配列に存在しないとき
        return UZ[x];
    }
};
 
class UnionFind {
public:
	UnionFind() = default;
    UnionFind(int N) : par(N), sz(N, 1) {
        iota(par.begin(), par.end(), 0);
    }
	int root(int x) {
		if (par[x] == x) return x;
		return (par[x] = root(par[x]));
	}
	bool unite(int x, int y) {
		int rx = root(x);
		int ry = root(y);
        if (rx == ry) return false;
		if (sz[rx] < sz[ry]) swap(rx, ry);
		sz[rx] += sz[ry];
		par[ry] = rx;
        return true;
	}
	bool issame(int x, int y) { return (root(x) == root(y)); }
	int size(int x) { return sz[root(x)]; }
    vector<vector<int>> groups(int N) {
        vector<vector<int>> G(N);
        for (int x = 0; x < N; x++) {
            G[root(x)].push_back(x);
        }
		G.erase( remove_if(G.begin(), G.end(),
            [&](const vector<int>& V) { return V.empty(); }), G.end());
        return G;
    }
private:
	vector<int> par, sz;
};
 
template<typename T>
struct BIT {
    int N;             // 要素数
    vector<T> bit[2];  // データの格納先
    BIT(int N_, int x = 0) {
        N = N_ + 1;
        bit[0].assign(N, 0); bit[1].assign(N, 0);
        if (x != 0) {
            for (int i = 0; i < N; i++) add(i, x);
        }
    }
    BIT(const vector<T> &A) {
        N = A.size() + 1;
        bit[0].assign(N, 0); bit[1].assign(N, 0);
        for (int i = 0; i < (int)A.size(); i++) add(i, A[i]);
    }
    void add_sub(int p, int i, T x) {
        while (i < N) { bit[p][i] += x; i += (i & -i); }
    }
    void add(int l, int r, T x) {
        add_sub(0, l + 1, -x * l); add_sub(0, r + 1, x * r);
        add_sub(1, l + 1, x); add_sub(1, r + 1, -x);
    }
    void add(int i, T x) { add(i, i + 1, x); }
    T sum_sub(int p, int i) {
        T ret = 0;
        while (i > 0) { ret += bit[p][i]; i -= (i & -i); }
        return ret;
    }
    T sum(int i) { return sum_sub(0, i) + sum_sub(1, i) * i; }
    T sum(int l, int r) { return sum(r) - sum(l); }
    T get(int i) { return sum(i, i + 1); }
    void set(int i, T x) { T s = get(i); add(i, -s + x); }
};
 
template<int mod> class Modint {
public:
    int val = 0;
    Modint(int x = 0) { while (x < 0) x += mod; val = x % mod; }
    Modint(const Modint &r) { val = r.val; }
 
    Modint operator -() { return Modint(-val); } // 単項
    Modint operator +(const Modint &r) { return Modint(*this) += r; }
    Modint operator +(const int &q) { Modint r(q); return Modint(*this) += r; }
    Modint operator -(const Modint &r) { return Modint(*this) -= r; }
    Modint operator -(const int &q) { Modint r(q); return Modint(*this) -= r; }
    Modint operator *(const Modint &r) { return Modint(*this) *= r; }
    Modint operator *(const int &q) { Modint r(q); return Modint(*this) *= r; }
    Modint operator /(const Modint &r) { return Modint(*this) /= r; }
    Modint operator /(const int &q) { Modint r(q); return Modint(*this) /= r; }
    
    Modint& operator ++() { val++; if (val >= mod) val -= mod; return *this; } // 前置
    Modint operator ++(signed) { ++*this; return *this; } // 後置
    Modint& operator --() { val--; if (val < 0) val += mod; return *this; }
    Modint operator --(signed) { --*this; return *this; }
    Modint &operator +=(const Modint &r) { val += r.val; if (val >= mod) val -= mod; return *this; }
    Modint &operator +=(const int &q) { Modint r(q); val += r.val; if (val >= mod) val -= mod; return *this; }
    Modint &operator -=(const Modint &r) { if (val < r.val) val += mod; val -= r.val; return *this; }
    Modint &operator -=(const int &q) { Modint r(q);  if (val < r.val) val += mod; val -= r.val; return *this; }
    Modint &operator *=(const Modint &r) { val = val * r.val % mod; return *this; }
    Modint &operator *=(const int &q) { Modint r(q); val = val * r.val % mod; return *this; }
    Modint &operator /=(const Modint &r) {
        int a = r.val, b = mod, u = 1, v = 0;
        while (b) {int t = a / b; a -= t * b; swap(a, b); u -= t * v; swap(u, v);}
        val = val * u % mod; if (val < 0) val += mod;
        return *this;
    }
    Modint &operator /=(const int &q) {
        Modint r(q); int a = r.val, b = mod, u = 1, v = 0;
        while (b) {int t = a / b; a -= t * b; swap(a, b); u -= t * v; swap(u, v);}
        val = val * u % mod; if (val < 0) val += mod;
        return *this;
    }
    bool operator ==(const Modint& r) { return this -> val == r.val; }
    bool operator <(const Modint& r) { return this -> val < r.val; }
    bool operator >(const Modint& r) { return this -> val > r.val; }
    bool operator !=(const Modint& r) { return this -> val != r.val; }
};
 
using mint = Modint<MOD>;
 
istream &operator >>(istream &is, mint& x) {
    int t; is >> t; x = t; return (is);
}
ostream &operator <<(ostream &os, const mint& x) {
    return os << x.val;
}
mint modpow(const mint &x, int n) {
    if (n < 0) return (mint)1 / modpow(x, -n); // 未verify
    assert(n >= 0);
    if (n == 0) return 1;
    mint t = modpow(x, n / 2);
    t = t * t;
    if (n & 1) t = t * x;
    return t;
}
 
int modpow(__int128_t x, int n, int mod) {
    assert(n >= 0 && mod > 0); // TODO: n <= -1
    __int128_t ret = 1;
    while (n > 0) {
        if (n % 2 == 1) ret = ret * x % mod;
        x = x * x % mod;
        n /= 2;
    }
    return ret;
}
int modinv(__int128_t x, int mod) {
    assert(mod > 0);
    // assert(x > 0);
    if (x == 1 or x == 0) return 1;
    return mod - modinv(mod % x, mod) * (mod / x) % mod;
}
 
istream &operator >>(istream &is, __int128_t& x) {
    string S; is >> S;
    __int128_t ret = 0;
    int f = 1;
    if (S[0] == '-') f = -1; 
    for (int i = 0; i < S.length(); i++)
        if ('0' <= S[i] && S[i] <= '9')
            ret = ret * 10 + S[i] - '0';
    x = ret * f;
    return (is);
}
ostream &operator <<(ostream &os, __int128_t x) {
    ostream::sentry s(os);
    if (s) {
        __uint128_t tmp = x < 0 ? -x : x;
        char buffer[128]; char *d = end(buffer);
        do {
            --d; *d = "0123456789"[tmp % 10]; tmp /= 10;
        } while (tmp != 0);
        if (x < 0) { --d; *d = '-'; }
        int len = end(buffer) - d;
        if (os.rdbuf()->sputn(d, len) != len) os.setstate(ios_base::badbit);
    }
    return os;
}
 
__int128_t stoll(string &S) {
    __int128_t ret = 0; int f = 1;
    if (S[0] == '-') f = -1; 
    for (int i = 0; i < S.length(); i++)
        if ('0' <= S[i] && S[i] <= '9') ret = ret * 10 + S[i] - '0';
    return ret * f;
}
__int128_t gcd(__int128_t a, __int128_t b) { return b ? gcd(b, a % b) : a; }
__int128_t lcm(__int128_t a, __int128_t b) {
    return a / gcd(a, b) * b;
    // lcmが__int128_tに収まる必要あり
}
 
string to_string(ld x, int k) { // xの小数第k位までをstring化する
    assert(k >= 0);
    stringstream ss;
    ss << setprecision(k + 2) << x;
    string s = ss.str();
    if (s.find('.') == string::npos) s += '.';
    int pos = s.find('.');
    for (int i = 0; k >= (int)s.size() - 1 - pos; i++) s += '0';
    s.pop_back();
    if (s.back() == '.') s.pop_back();
    return s;
 
    // stringstream ss; // 第k+1位を四捨五入して第k位まで返す
    // ss << setprecision(k + 1) << x;
    // string s = ss.str();
    // if (s.find('.') == string::npos) s += '.';
    // int pos = s.find('.');
    // for (int i = 0; k > (int)s.size() - 1 - pos; i++) s += '0';
    // if (s.back() == '.') s.pop_back();
    // return s;
}
string to_string(__int128_t x) {
    string ret = "";
    if (x < 0) { ret += "-"; x *= -1; }
    while (x) { ret += (char)('0' + x % 10); x /= 10; }
    reverse(ret.begin(), ret.end());
    return ret;
}
string to_string(char c) { string s = ""; s += c; return s; }
 
template<class T> size_t HashCombine(const size_t seed,const T &v) {
    return seed^(hash<T>()(v)+0x9e3779b9+(seed<<6)+(seed>>2));
}
template<class T,class S> struct hash<pair<T,S>>{
    size_t operator()(const pair<T,S> &keyval) const noexcept {
        return HashCombine(hash<T>()(keyval.first), keyval.second);
    }
};
template<class T> struct hash<vector<T>>{
    size_t operator()(const vector<T> &keyval) const noexcept {
        size_t s=0;
        for (auto&& v: keyval) s=HashCombine(s,v);
        return s;
    }
};
template<int N> struct HashTupleCore{
    template<class Tuple> size_t operator()(const Tuple &keyval) const noexcept{
        size_t s=HashTupleCore<N-1>()(keyval);
        return HashCombine(s,get<N-1>(keyval));
    }
};
template <> struct HashTupleCore<0>{
    template<class Tuple> size_t operator()(const Tuple &keyval) const noexcept{ return 0; }
};
template<class... Args> struct hash<tuple<Args...>>{
    size_t operator()(const tuple<Args...> &keyval) const noexcept {
        return HashTupleCore<tuple_size<tuple<Args...>>::value>()(keyval);
    }
};
 
vector<mint> _fac, _finv, _inv;
void COMinit(int N) {
    _fac.resize(N + 1); _finv.resize(N + 1);  _inv.resize(N + 1);
    _fac[0] = _fac[1] = 1; _finv[0] = _finv[1] = 1; _inv[1] = 1;
    for (int i = 2; i <= N; i++) {
        _fac[i] = _fac[i-1] * mint(i);
        _inv[i] = -_inv[MOD % i] * mint(MOD / i);
        _finv[i] = _finv[i - 1] * _inv[i];
    }
}
 
mint FAC(int N) {
    if (N < 0) return 0; return _fac[N];
}
mint COM(int N, int K) {
    if (N < K) return 0; if (N < 0 or K < 0) return 0;
    return _fac[N] * _finv[K] * _finv[N - K];
}
mint PERM(int N, int K) {
    if (N < K) return 0; if (N < 0 or K < 0) return 0;
    return _fac[N] *  _finv[N - K];
}
mint NHK(int N, int K) { // initのサイズに注意
    if (N == 0 && K == 0)  return 1;
    return COM(N + K - 1, K);
}
 
#pragma endregion

signed main() {
    int H, W;
    cin >> H >> W;
    vector<vector<int>> A(H, vector<int>(W));
    for (int i = 0; i < H; i++) {
        for (int j = 0; j < W; j++) {
            cin >> A[i][j];
        }
    }

    int ans = 0;
    for (int i = 0; i < H; i++) {
        for (int j = 0; j < W; j++) {
            // そのマスから書く方向にどれだけ伸ばせるか
            ans += A[i][j] * (i + 1) * (H - i) * (j + 1) * (W - j);
        }
    }
    cout << ans << endl;
}
accuracy: 1
time_ms: 10
memory_kb: 5308
final_rank: 13

code_snippet: #pragma GCC optimize("Ofast")
#include <iostream>
#include <vector>
#include <algorithm>
#include <map>
#include <queue>
#include <cstdio>
#include <ctime>
#include <assert.h>
#include <chrono>
#include <random>
#include <numeric>
#include <set>
#include <deque>
#include <stack>
#include <sstream>
#include <utility>
#include <cstring>
#include <unordered_map>
#include <unordered_set>
#include <tuple>
#include <array>
#include <bitset>
using namespace std;
typedef long long int ll;
typedef unsigned long long ull;

mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
ll myRand(ll B) {
    return (ull)rng() % B;
}
inline ll time() {
    return static_cast<long double>(chrono::duration_cast<chrono::nanoseconds>(chrono::steady_clock::now().time_since_epoch()).count()) * 1e-9;
}

int main(){
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    int h,w; cin >> h >> w;
    vector<vector<ll>> a(h,vector<ll>(w));
    for(int i=0;i<h;i++){
        for(int j=0;j<w;j++){
            cin >> a[i][j];
        }
    }
    ll res = 0;
    for(int i=0;i<h;i++){
        for(int j=0;j<w;j++){
            res += (ll)(i+1)*(ll)(h-i)*(ll)(j+1)*(ll)(w-j)*a[i][j];
        }
    }
    cout << res << endl;
}
accuracy: 1
time_ms: 10
memory_kb: 5220
final_rank: 12

code_snippet: #include <bits/stdc++.h>
using namespace std;

using ll = long long;

int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);

  int h, w;
  cin >> h >> w;

  vector<vector<ll>> x(h + 1, vector<ll>(w + 1));
  for (int i = 1; i <= h; i++) {
    for (int j = 1; j <= w; j++) {
      cin >> x.at(i).at(j);
    }
  }

  for (int i = 1; i <= h; i++) {
    for (int j = 1; j <= w; j++) {
      x.at(i).at(j) += x.at(i).at(j - 1);
    }
  }
  for (int i = 1; i <= h; i++) {
    for (int j = 1; j <= w; j++) {
      x.at(i).at(j) += x.at(i - 1).at(j);
    }
  }

  ll ans = 0;
  for (int i = 1; i <= h; i++) {
    for (int j = 1; j <= w; j++) {
      ll count = (i + 1) * (j + 1);
      count += (h - i + 1) * (w - j + 1);
      count -= 2;
      ans += x.at(i).at(j) * count;
      count = -2;
      count += (i + 1) * (w - j + 1);
      count += (h - i + 1) * (j + 1);
      ans -= x.at(i).at(j) * count;
    }
  }

  cout << ans << '\n';
}
accuracy: 1
time_ms: 10
memory_kb: 5192
final_rank: 11

code_snippet: #include <bits/stdc++.h>
//#include <atcoder/all>
//using namespace atcoder;
#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
using namespace std;
 
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef pair<int, int> pii;
typedef pair<long long, long long> PLL;
typedef pair<int, PII> TIII;
 
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
 
 
#define FOR(i, s, n) for (int i = s; i < (int)n; ++i)
#define REP(i, n) FOR(i, 0, n)
#define rep(i, a, b) for (int i = a; i < (b); ++i)
#define trav(a, x) for (auto &a : x)
#define all(x) x.begin(), x.end()
 
#define MOD 1000000007
 
template<class T1, class T2> inline bool chmax(T1 &a, T2 b) {if (a < b) {a = b; return true;} return false;}
template<class T1, class T2> inline bool chmin(T1 &a, T2 b) {if (a > b) {a = b; return true;} return false;}
const double EPS = 1e-8, PI = acos(-1);
const double pi = 3.141592653589793238462643383279;
//ここから編集    
typedef string::const_iterator State;
ll GCD(ll a, ll b){
  return (b==0)?a:GCD(b, a%b);
}
ll LCM(ll a, ll b){
  return a/GCD(a, b) * b;
}
template< int mod >
struct ModInt {
  int x;
 
  ModInt() : x(0) {}
 
  ModInt(int64_t y) : x(y >= 0 ? y % mod : (mod - (-y) % mod) % mod) {}
 
  ModInt &operator+=(const ModInt &p) {
    if((x += p.x) >= mod) x -= mod;
    return *this;
  }
 
  ModInt &operator-=(const ModInt &p) {
    if((x += mod - p.x) >= mod) x -= mod;
    return *this;
  }
 
  ModInt &operator*=(const ModInt &p) {
    x = (int) (1LL * x * p.x % mod);
    return *this;
  }
 
  ModInt &operator/=(const ModInt &p) {
    *this *= p.inverse();
    return *this;
  }
 
  ModInt operator-() const { return ModInt(-x); }
 
  ModInt operator+(const ModInt &p) const { return ModInt(*this) += p; }
 
  ModInt operator-(const ModInt &p) const { return ModInt(*this) -= p; }
 
  ModInt operator*(const ModInt &p) const { return ModInt(*this) *= p; }
 
  ModInt operator/(const ModInt &p) const { return ModInt(*this) /= p; }
 
  bool operator==(const ModInt &p) const { return x == p.x; }
 
  bool operator!=(const ModInt &p) const { return x != p.x; }
 
  ModInt inverse() const {
    int a = x, b = mod, u = 1, v = 0, t;
    while(b > 0) {
      t = a / b;
      swap(a -= t * b, b);
      swap(u -= t * v, v);
    }
    return ModInt(u);
  }
 
  ModInt pow(int64_t n) const {
    ModInt ret(1), mul(x);
    while(n > 0) {
      if(n & 1) ret *= mul;
      mul *= mul;
      n >>= 1;
    }
    return ret;
  }
 
  friend ostream &operator<<(ostream &os, const ModInt &p) {
    return os << p.x;
  }
 
  friend istream &operator>>(istream &is, ModInt &a) {
    int64_t t;
    is >> t;
    a = ModInt< mod >(t);
    return (is);
  }
 
  static int get_mod() { return mod; }
};
 
using modint = ModInt< 998244353 >;
template< typename T >
struct Combination {
  vector< T > _fact, _rfact, _inv;
 
  Combination(int sz) : _fact(sz + 1), _rfact(sz + 1), _inv(sz + 1) {
    _fact[0] = _rfact[sz] = _inv[0] = 1;
    for(int i = 1; i <= sz; i++) _fact[i] = _fact[i - 1] * i;
    _rfact[sz] /= _fact[sz];
    for(int i = sz - 1; i >= 0; i--) _rfact[i] = _rfact[i + 1] * (i + 1);
    for(int i = 1; i <= sz; i++) _inv[i] = _rfact[i] * _fact[i - 1];
  }
 
  inline T fact(int k) const { return _fact[k]; }
 
  inline T rfact(int k) const { return _rfact[k]; }
 
  inline T inv(int k) const { return _inv[k]; }
 
  T P(int n, int r) const {
    if(r < 0 || n < r) return 0;
    return fact(n) * rfact(n - r);
  }
 
  T C(int p, int q) const {
    if(q < 0 || p < q) return 0;
    return fact(p) * rfact(q) * rfact(p - q);
  }
 
  T H(int n, int r) const {
    if(n < 0 || r < 0) return (0);
    return r == 0 ? 1 : C(n + r - 1, r);
  }
};
 
ll modpow(ll x, ll n, ll mod) {
  ll res = 1;
  x %= mod;
  if(x == 0) return 0;
  while(n) {
    if(n&1) res = (res * x) % mod;
    x = (x * x) % mod;
    n >>= 1;
  }
  return res;
} 
inline long long mod(long long a, long long m) {
    return (a % m + m) % m;
}
template<typename T> 
struct BIT{
  int N;
  std::vector<T> node;
  BIT(){}
  BIT(int n){
    N = n;
    node.resize(N+10);
  }
  void build(int n) {
    N = n;
    node.resize(N+10);
  }
  /* a: 1-indexed */
  void add(int a, T x){
    for(int i=a; i<(int)node.size(); i += i & -i) node[i] += x;
  }

  /* [1, a] */
  T sum(int a){
    T res = 0;
    for(int x=a; x>0; x -= x & -x) res += node[x];
    return res;
  }

  /* [l, r] */
  T rangesum(int l, int r){
    return sum(r) - sum(l-1);
  }

  /* 
    a1+a2+...+aw >= valとなるような最小のwを返す
    @verify https://codeforces.com/contest/992/problem/E
  */
  int lower_bound(T val) {
    if(val < 0) return 0;

    int res = 0;
    int n = 1; 
    while (n < N) n *= 2;

    T tv=0;
    for (int k = n; k > 0; k /= 2) {
      if(res + k < N && node[res + k] < val){
        val -= node[res+k];
        res += k;
      }
    }
    return res+1; 
  }
};
struct UnionFind{
  std::vector<int> par;
  std::vector<int> siz;

  UnionFind(int sz_): par(sz_), siz(sz_) {
    for(int i=0; i<sz_; ++i) par[i] = i, siz[i] = 1;
  }

  void init(int sz_){
    par.resize(sz_);
    siz.resize(sz_);
    for(int i=0; i<sz_; ++i) par[i] = i, siz[i] = 1;
  }

  int root(int x){
    if(x == par[x]) return x;
    return par[x] = root(par[x]);
  }

  bool merge(int x, int y){
    x = root(x), y = root(y);
    if(x == y) return false;
    if(siz[x] < siz[y]) std::swap(x, y);
    siz[x] += siz[y];
    par[y] = x;
    return true;
  }

  bool issame(int x, int y){
    return root(x) == root(y);
  }

  int size(int x){
    return siz[root(x)];
  }
};
struct RollingHash{

    using ull = unsigned long long;
    const ull mod = (1ULL << 61) - 1;
    const ull MASK30 = (1ULL << 30) - 1;
    const ull MASK31 = (1ULL << 31) - 1;

    const ull MASK61 = mod;

    ull base;
    int n;
    vector<ull> hash, pow;

    RollingHash(const string &s)
    {
        random_device rnd;
        mt19937_64 mt(rnd());
        base = 1001;
        
        n = (int)s.size();
        hash.assign(n+1, 0);
        pow.assign(n+1, 1);
        
        for(int i=0; i<n; i++){
            hash[i+1] = calc_mod(mul(hash[i], base) + s[i]);
            pow[i+1] = calc_mod(mul(pow[i], base));
        }
    }

    ull calc_mod(ull x){
        ull xu = x >> 61;
        ull xd = x & MASK61;
        ull res = xu + xd;
        if(res >= mod) res -= mod;
        return res;
    }

    ull mul(ull a, ull b){
        ull au = a >> 31;
        ull ad = a & MASK31;
        ull bu = b >> 31;
        ull bd = b & MASK31;
        ull mid = ad * bu + au * bd;
        ull midu = mid >> 30;
        ull midd = mid & MASK30;
        return calc_mod(au * bu * 2 + midu + (midd << 31) + ad * bd);
    }

    //[l,r)のハッシュ値
    inline ull get(int l, int r){
        ull res = calc_mod(hash[r] + mod*3-mul(hash[l], pow[r-l]));
        return res;
    }
    //string tのハッシュ値
    inline ull get(string t){
        ull res = 0;
        for(int i=0; i<t.size(); i++){
            res = calc_mod(mul(res, base)+t[i]);
        }
        return res;
    }
    //string s中のtの数をカウント
    inline int count(string t) {
        if(t.size() > n) return 0;
        auto hs = get(t);
        int res = 0;
        for(int i=0; i<n-t.size()+1; i++){
            if(get(i, i+t.size()) == hs) res++; 
        }
        return res;
    }

    /* 
        concat 
        @verify https://codeforces.com/problemset/problem/514/C
    */
    inline ull concat(ull h1, ull h2, int h2len){
      return calc_mod(h2 + mul(h1, pow[h2len]));
    }

    // LCPを求める S[a:] T[b:]
    inline int LCP(int a, int b){
        int len = min((int)hash.size()-a, (int)hash.size()-b);
        
        int lb = -1, ub = len;
        while(ub-lb>1){
            int mid = (lb+ub)/2;

            if(get(a, a+mid) == get(b, b+mid)) lb = mid;
            else ub = mid;
        }
        return lb;
    }
};
ll dp[510][4];
int main() {  
  cin.tie(0);
  ios::sync_with_stdio(false);
  cout << fixed << setprecision(12);
  
  ll h, w; cin >> h >> w;
  
  vector<vector<ll>> a(h, vector<ll>(w));
  vector<vector<ll>> cums(h, vector<ll>(w+1));
  REP(i,h) {
    REP(j,w) {
      cin >> a[i][j];
    }
  }
  REP(i,h) {
    REP(j,w) {
      cums[i][j+1] = cums[i][j] + a[i][j];
    }
  }

  ll ans = 0;
  
  REP(i,w) {
    for(int j=i; j<w; j++) {
      REP(k,h) {
        ans += (cums[k][j+1] - cums[k][i]) * (k+1) * (h-k);
      }
    }
  }
  cout << ans << endl;
  return 0;
}
accuracy: 1
time_ms: 70
memory_kb: 6996
final_rank: 20

code_snippet: #include<iostream>
using namespace std;
typedef long long ll;

int main(){
    int h, w;
    cin >> h >> w;
    ll ans = 0;
    for(int i = 0; i < h; i++){
        for(int j = 0; j < w; j++){
            ll x;  cin >> x;
            ans += x*(i+1)*(h-i)*(j+1)*(w-j);
        }
    }
    cout << ans << endl;
    return 0;
}
accuracy: 1
time_ms: 20
memory_kb: 3124
final_rank: 6

code_snippet: #include<bits/stdc++.h>
using namespace std;
#define int long long

#ifdef LOCAL_DEBUG
  #include "LOCAL_DEBUG.hpp"
#endif


signed main(){

  int H,W; cin >> H >> W;
  static int table[501][501];
  for(int i = 0; i < H; i++){
    for(int j = 0; j < W; j++){
      cin >> table[i][j];
    }
  }

  int ans = 0;
  for(int i = 0; i < H; i++){
    for(int j = 0; j < W; j++){
      ans += table[i][j] * ((i+1) * (H-i)) * ((j+1) * (W-j));
    }
  }
  cout << ans << endl;

  return 0;
}
accuracy: 1
time_ms: 20
memory_kb: 5060
final_rank: 16

code_snippet: #include <bits/stdc++.h>

using namespace std;

int main(){
  int h,w; cin >> h >> w;
  long long a; 
  unsigned long long ans=0;
  for(int i=0;i<h;++i){
    for(int j=0;j<w;++j){
      cin >> a;
      ans+=a*(i+1)*(j+1)*(h-i)*(w-j); //左上のどれかが右下のどれかを選ぶ個数
    }
  }
  cout << ans << endl;
  return 0;
}
accuracy: 1
time_ms: 20
memory_kb: 3068
final_rank: 1

code_snippet: #include <bits/stdc++.h>

using namespace std;

int main(){
  int h,w; cin >> h >> w;
  unsigned long long int ans=0;
  for(int i=0;i<h;++i){
    for(int j=0;j<w;++j){
      long long a; cin >> a;
      ans+=a*(i+1)*(j+1)*(h-i)*(w-j); //左上のどれかが右下のどれかを選ぶ個数
    }
  }
  cout << ans << endl;
  return 0;
}
accuracy: 1
time_ms: 30
memory_kb: 3076
final_rank: 7

code_snippet: #include <bits/stdc++.h>
using namespace std;

#define int				long long
#define FOR( i, m, n )  for( int (i) = (m); (i) < (n); (i)++ )
#define FORE( i, m, n ) FOR( i, m , n + 1 )
#define REP( i, n )     FOR( i, 0, n )
#define REPE( i, n )	FOR( i, 0, n + 1 )
#define REPA( i, n )	FOR( i, 1, n )
#define FORR( i, m, n ) for( int (i) = (m); (i) >= 0; (i)-- )
#define ALL( a )        (a).begin(), (a).end()             
#define MP( a, b )		make_pair( (a), (b) )
#define fi				first
#define se				second

const int INF = 1e9;
const int MOD = 1e9 + 7;

signed main() {
	int h, w; cin >> h >> w;

	
	int ans = 0;
	REP( i, h ) {
		REP( j, w ) {
			int t; cin >> t;

			int right = w - j;
			int left = j + 1;
			int up = i + 1;
			int down = h - i;

			ans += t * right* left * up * down;

		}
	}

	cout << ans << endl;
}
accuracy: 1
time_ms: 20
memory_kb: 3104
final_rank: 2

code_snippet: #include <bits/stdc++.h>
#define int long long
#define double long double
#define INF 1e18
using namespace std;
//int grid[500][500], sum[500][500];
signed main() {
  int H, W; cin >> H >> W;
  int ans = 0;
  for (int i = 0; i < H; i++) {
    for (int j = 0; j < W; j++) {
      int a; cin >> a;
      int p = (i + 1) * (H - i);
      int q = (j + 1) * (W - j);
      ans += a * ((i+1)*(H-i)) * ((j+1)*(W-j));
    }
  }
  cout << ans << endl;
}
accuracy: 1
time_ms: 30
memory_kb: 3096
final_rank: 8

code_snippet: #include<bits/stdc++.h>
using namespace std;

#define int long long


signed main(){
  

  int H, W;
  int A, ans = 0;
  int num, num2, num3, num4;

  cin>>H>>W;

  num = H, num2 = H;

  for(int i = 0; i < H; i++){
    num3 = num4 = W;
    for(int j = 0; j < W; j++){
      cin>>A;
      ans += num*num3*A;
      //  cout<<i<<" "<<j<<" "<<num<<" "<<num3<<" "<<A<<endl;
      
      num4 -= 2;
      num3 += num4;
    }
    
    num2 -= 2;
    num += num2;
  }

  cout<<ans<<endl;
  
  return 0;
}
accuracy: 1
time_ms: 20
memory_kb: 3104
final_rank: 2

code_snippet: #include <bits/stdc++.h>
#define r(i,n) for(int i=0;i<n;i++)
#define int long long
using namespace std;
typedef pair<int,int>P;
#define fi first
#define se second

int s1[1000];
int s2[1000];

signed main(){
	int a,b;
	cin>>a>>b;

	int x[a][b];
	r(i,a)r(j,b)cin>>x[i][j];

	for(int i=0;i<a;i++){
		for(int j=i;j<a;j++){
			for(int k=i;k<=j;k++){
				s1[k]++;
			}
		}
	}

	for(int i=0;i<b;i++){
		for(int j=i;j<b;j++){
			for(int k=i;k<=j;k++){
				s2[k]++;
			}
		}
	}

	int s=0;

	r(i,a){
		r(j,b){
			s+=x[i][j]*s1[i]*s2[j];
		}
	}
	cout<<s<<endl;
}
accuracy: 1
time_ms: 40
memory_kb: 5072
final_rank: 18

code_snippet: #include<bits/stdc++.h>
using namespace std;
#define lp(i,n) for(int i=0;i<n;i++)
#define lps(i,j,n) for(int i=j;i<n;i++)
#define fordebug int hoge;cin>>hoge;
#define DEKAI 1000000007;
#define INF (1<<28)
#define int long long
#define double long double
#define floot10 cout<<fixed<<setprecision(10)
int ans[500],anss[500];

signed main(){
  int h,w;
  cin>>h>>w;
  int now=1;
  int mode=0;
  int s;
  lp(i,(h+1)/2){
    s=i+1;
    now=0;
    mode=0;
    lp(j,h){
      if(now<s&&mode==0) now++;
      if(mode==1) now--;
      ans[j]+=now;
      if(h-s==j) mode=1;
    }
  }
  if(h%2==0){
    s++;
  }
  while(1){
    s--;
    if(s==0) break;
    now=0;
    mode=0;
    lp(j,h){
      if(now<s&&mode==0) now++;
      if(mode==1) now--;
      ans[j]+=now;
      if(h-s==j) mode=1;
    }
  }
  lp(i,(w+1)/2){
    s=i+1;
    now=0;
    mode=0;
    lp(j,w){
      if(now<s&&mode==0) now++;
      if(mode==1) now--;
      anss[j]+=now;
      if(w-s==j) mode=1;
    }
  }
  if(w%2==0){
    s++;
  }
  while(1){
    s--;
    if(s==0) break;
    now=0;
    mode=0;
    lp(j,w){
      if(now<s&&mode==0) now++;
      if(mode==1) now--;
      anss[j]+=now;
      if(w-s==j) mode=1;
    }
  }
  /*lp(i,h){
    cout<<ans[i];
  }
  cout<<endl;
  lp(j,w)cout<<anss[j];
  cout<<endl;*/
  int cn=0;
  lp(i,h){
    lp(j,w){
      int n;
      cin>>n;
      cn+=n*(ans[i]*anss[j]);
    }
  }
  cout<<cn<<endl;
  return 0;
}
accuracy: 1
time_ms: 20
memory_kb: 3112
final_rank: 4

code_snippet: #include<bits/stdc++.h>
using namespace std;
#define MOD 1000000007
#define BIG 1000000010
#define repi(i,x,n) for(int i=x;i<n;i++)
#define rep(i,n) repi(i,0,n)
#define repn(i,n) for(int i=n;i>=0;i--)
typedef long long int ll;


int main(){
  ll h,w;
  ll ans=0;
  ll mp[500][500];
  cin>>h>>w;
  rep(i,h){
    rep(j,w){
      cin>>mp[i][j];
      ans+=((i+1)*(h-i) )*((j+1)*(w-j) )*mp[i][j];
    }
  }
  cout<<ans<<endl;
  return 0;
}
accuracy: 1
time_ms: 30
memory_kb: 5048
final_rank: 17

code_snippet: #include<iostream>
#include<vector>
#include<algorithm>
#include<string>
#define REP(i,n) for(int i=0;i<(n);++i)
#define REPA(i,n) for(int i=1;i<(n);++i)
#define MOD ((int)1e9 + 7)
#define INF ((int)1e9)
#define ALL(x) (x).begin(),(x).end()
#define ctoi(x) (x - 'a') 
#define CTOI(x) (x - 'A')
using namespace std;
int main(){
    int H,W;
    cin>>H>>W;
    vector<vector<int> > map(H,vector<int>(W));
    REP(i,H){
        REP(j,W){
            cin >> map[i][j];
        }
    }
    long long ans = 0;
    REP(i,H){
        REP(j,W){
            ans += (long long)map[i][j] * (i+1) * (H-i) * (j+1) * (W-j);
        }
    }
    cout << ans << endl;
    return 0;
}
accuracy: 1
time_ms: 20
memory_kb: 3956
final_rank: 10

code_snippet: #include<bits/stdc++.h>
using namespace std;
#define int long long

signed main()
{
   int H,W; cin>>H>>W;
   vector<vector<int> > a(H,vector<int>(W));
   for(int i=0;i<H;i++){
      for(int j=0;j<W;j++){
         cin>>a[i][j];
      }
   }
   
   int sum=0;
   for(int i=0;i<H;i++){
      for(int j=0;j<W;j++){
         int k=(i+1)*(j+1)*(H-i)*(W-j);
         sum+=k*a[i][j];
      }
   }
   cout<<sum<<endl;
}
accuracy: 1
time_ms: 20
memory_kb: 4748
final_rank: 14

code_snippet: #include <iostream>
#include <string>
#include <utility>
#include <algorithm>
#include <map>
#include <set>
#include <vector>
#include <cmath>
#include <cstdlib>
#include <queue>
#include <stack>
#include <iomanip>

using namespace std;

#define REP(i, n) for(ll i = 0;i < n;i++)
#define REPR(i, n) for(ll i = n;i >= 0;i--)
#define FOR(i, m, n) for(ll i = m;i < n;i++)
#define FORR(i, m, n) for(ll i = m;i >= n;i--)
#define REPO(i, n) for(ll i = 1;i <= n;i++)
#define ll long long
#define INF (ll)1 << 60
#define MINF (-1 * INF)
#define ALL(n) n.begin(),n.end()
#define MOD 1000000007
#define P pair<ll, ll>

ll h, w, ans = 0;
int main() {
	cin >> h >> w;
	REPO(i, h) {
		REPO(j, w) {
			ll a;
			cin >> a;
			ans += a * i * (h + 1 - i) * j * (w + 1 - j);
		}
	}
	cout << ans << endl;
}
accuracy: 1
time_ms: 20
memory_kb: 3112
final_rank: 4

code_snippet: #include<bits/stdc++.h>
#define INF 1e9
#define llINF 1e18
#define MOD 1000000007
#define pb push_back
#define mp make_pair 
#define F first
#define S second
#define ll long long
#define ull unsigned long long
#define vi vector<ll>
#define vvi vector<vi>
#define BITLE(n) (1LL<<(n))
#define BITCNT(n) (__builtin_popcountll(n))
#define SUBS(s,f,t) ((s).substr((f)-1,(t)-(f)+1))
#define ALL(a) (a).begin(),(a).end()
using namespace std;
struct Grid{ll x,y,t;};
struct Edge{ll to,cost;};
struct Graph{vector<vector<Edge>>E;int V;
  const ll Inf = llINF;const int MAX_V=201010;vector<ll>d;
  Graph(int n):E(n){d.resize(MAX_V);E.resize(n);V=n;}
  void init(){for(int i=0;i<MAX_V;i++)d[i]=Inf;}
  void add_edge(ll from,ll to,ll cost){E[from].pb({to,cost});}
};
ll kake[1000][1000];
int main(){
  cin.tie(0);
  ios::sync_with_stdio(false);
  ll h,w;cin>>h>>w;
  ll ans=0;
  for(int i=0;i<h/2+(h%2);i++){
    for(int j=0;j<w/2+(w%2);j++){
      kake[i][j]=(h-i)*(i+1)*(w-j)*(j+1);
      if(h%2==1&&i==h/2*(h%2) && w%2==1&&j==w/2*(w%2)){
      }else if(h%2==1&&i==h/2*(h%2)){
	kake[i][w-j-1]=(h-i)*(i+1)*(w-j)*(j+1);
      }else if(w%2==1&&j==w/2*(w%2)){
	kake[h-i-1][j]=(h-i)*(i+1)*(w-j)*(j+1);
      }else{
	kake[h-i-1][j]=(h-i)*(i+1)*(w-j)*(j+1);
	kake[h-i-1][w-j-1]=(h-i)*(i+1)*(w-j)*(j+1);
	kake[i][w-j-1]=(h-i)*(i+1)*(w-j)*(j+1);
      }
    }
  }

  for(int i=0;i<h;i++){
    for(int j=0;j<w;j++){
      ll num;
      cin>>num;
      ans+=num*kake[i][j];
    }
  }
  cout<<ans<<endl;
  return 0;
}
accuracy: 1
time_ms: 10
memory_kb: 7136
final_rank: 19

code_snippet: #include "bits/stdc++.h"

#pragma warning(disable:4996)
using namespace std;


int main() {
	int H,W;cin>>H>>W;
	vector<vector<int>>field(H,vector<int>(W));
	long long int answer=0;
	for (int i = 0; i < H; ++i) {
		for (int j = 0; j < W; ++j) {
			long long int a; cin >> a;
			int l=j+1;
			int r=W-j;
			int u=i+1;
			int d=H-i;

			answer+=a*l*r*u*d;
		}
	}
	cout<<answer<<endl;
	return 0;
}
accuracy: 1
time_ms: 20
memory_kb: 3940
final_rank: 9