Problem p03163 (C++)

Buggy submission (status: Runtime Error):
#include <bits/stdc++.h>

#define FOR(i, a, b) for (int i = (a); i < ((int)b); ++i)
#define RFOR(i, a) for (int i = (a); i >= 0; --i)
#define FOE(i, a) for (auto i : a)
#define ALL(c) (c).begin(), (c).end()
#define RALL(c) (c).rbegin(), (c).rend()
#define DUMP(x) cerr << #x << " = " << (x) << endl;
#define SUM(x) std::accumulate(ALL(x), 0LL)
#define MIN(v) *std::min_element(v.begin(), v.end())
#define MAX(v) *std::max_element(v.begin(), v.end())
#define EXIST(v, x) (std::find(v.begin(), v.end(), x) != v.end())
#define BIT_ON(bit, i) (((bit >> i) & 1) > 0)

typedef long long LL;
template <typename T> std::vector<T> make_v(size_t a) {
  return std::vector<T>(a);
}
template <typename T, typename... Ts> auto make_v(size_t a, Ts... ts) {
  return std::vector<decltype(make_v<T>(ts...))>(a, make_v<T>(ts...));
} // C++14
template <typename T, typename V>
typename std::enable_if<std::is_class<T>::value == 0>::type fill_v(T &t,
                                                                   const V &v) {
  t = v;
}
template <typename T, typename V>
typename std::enable_if<std::is_class<T>::value != 0>::type fill_v(T &t,
                                                                   const V &v) {
  for (auto &e : t)
    fill_v(e, v);
}
template <class T> inline T ceil(T a, T b) { return (a + b - 1) / b; }
template <class T> inline void print(T x) { std::cout << x << std::endl; }
template <class T> inline void print_vec(const std::vector<T> &v) {
  for (int i = 0; i < v.size(); ++i) {
    if (i != 0) {
      std::cout << " ";
    }
    std::cout << v[i];
  }
  std::cout << "\n";
}
template <class T> inline bool inside(T y, T x, T H, T W) {
  return 0 <= y and y < H and 0 <= x and x < W;
}
template <class T> inline double euclidean_distance(T y1, T x1, T y2, T x2) {
  return sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2));
}
template <class T> inline double manhattan_distance(T y1, T x1, T y2, T x2) {
  return abs(x1 - x2) + abs(y1 - y2);
}
template <typename T> T &chmin(T &a, const T &b) { return a = std::min(a, b); }
template <typename T> T &chmax(T &a, const T &b) { return a = std::max(a, b); }

template <class T> inline std::vector<T> unique(std::vector<T> v) {
  sort(v.begin(), v.end());
  v.erase(unique(v.begin(), v.end()), v.end());
  return v;
}
// 初項s, 交差dのn個の数列の和
long long sum_of_arithmetic_progression(long long s, long long d, long long n) {
  return n * (2 * s + (n - 1) * d) / 2;
}

// 2のべき乗数かどうか
bool is_power_of_two(long long x) { return !(x & (x - 1)); }

// aとbの最大公約数 O(log min(a, b))
long long gcd(long long a, long long b) {
  if (b == 0) {
    return a;
  }
  return gcd(b, a % b);
}

// 数列vの最大公約数 O(N log d)
long long gcd(std::vector<long long> &v) {
  long long ans = v[0];
  for (int i = 1; i < (int)v.size(); ++i) {
    ans = gcd(ans, v[i]);
  }
  return ans;
}

// aとbの最小公倍数 O(log min(a, b))
long long lcm(long long a, long long b) {
  long long g = gcd(a, b);
  return a / g * b;
}

const int INF = 1 << 30;
const double EPS = 1e-9;
const long double PI = acos(-1.0);
const std::vector<int> dy2 = {0, 1}, dx2 = {1, 0}; // 右，下
const std::vector<int> dy4 = {0, -1, 0, 1},
                       dx4 = {1, 0, -1, 0}; // 右，上，左，下
const std::vector<int> dy8 = {0, -1, 0, 1, 1, -1, -1, 1},
                       dx8 = {1, 0, -1, 0, 1, 1, -1, -1};

using namespace std;

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

  LL N, W;
  cin >> N >> W;
  auto weight = make_v<LL>(N);
  auto value = make_v<LL>(N);
  FOR(i, 0, N) { cin >> weight[i] >> value[i]; }

  auto dp = make_v<LL>(N + 100, W + 100);
  FOR(i, 0, N) {
    FOR(j, 0, W + 1) {
      // use
      chmax(dp[i + 1][j + weight[i]], dp[i][j] + value[i]);
      // not use
      chmax(dp[i + 1][j], dp[i][j]);
    }
  }
  LL ans = -INF;
  FOR(j, 0, W + 1) { chmax(ans, dp[N][j]); }
  print(ans);

  return 0;
}


Fixed submission:
#include <bits/stdc++.h>

#define FOR(i, a, b) for (int i = (a); i < ((int)b); ++i)
#define RFOR(i, a) for (int i = (a); i >= 0; --i)
#define FOE(i, a) for (auto i : a)
#define ALL(c) (c).begin(), (c).end()
#define RALL(c) (c).rbegin(), (c).rend()
#define DUMP(x) cerr << #x << " = " << (x) << endl;
#define SUM(x) std::accumulate(ALL(x), 0LL)
#define MIN(v) *std::min_element(v.begin(), v.end())
#define MAX(v) *std::max_element(v.begin(), v.end())
#define EXIST(v, x) (std::find(v.begin(), v.end(), x) != v.end())
#define BIT_ON(bit, i) (((bit >> i) & 1) > 0)

typedef long long LL;
template <typename T> std::vector<T> make_v(size_t a) {
  return std::vector<T>(a);
}
template <typename T, typename... Ts> auto make_v(size_t a, Ts... ts) {
  return std::vector<decltype(make_v<T>(ts...))>(a, make_v<T>(ts...));
} // C++14
template <typename T, typename V>
typename std::enable_if<std::is_class<T>::value == 0>::type fill_v(T &t,
                                                                   const V &v) {
  t = v;
}
template <typename T, typename V>
typename std::enable_if<std::is_class<T>::value != 0>::type fill_v(T &t,
                                                                   const V &v) {
  for (auto &e : t)
    fill_v(e, v);
}
template <class T> inline T ceil(T a, T b) { return (a + b - 1) / b; }
template <class T> inline void print(T x) { std::cout << x << std::endl; }
template <class T> inline void print_vec(const std::vector<T> &v) {
  for (int i = 0; i < v.size(); ++i) {
    if (i != 0) {
      std::cout << " ";
    }
    std::cout << v[i];
  }
  std::cout << "\n";
}
template <class T> inline bool inside(T y, T x, T H, T W) {
  return 0 <= y and y < H and 0 <= x and x < W;
}
template <class T> inline double euclidean_distance(T y1, T x1, T y2, T x2) {
  return sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2));
}
template <class T> inline double manhattan_distance(T y1, T x1, T y2, T x2) {
  return abs(x1 - x2) + abs(y1 - y2);
}
template <typename T> T &chmin(T &a, const T &b) { return a = std::min(a, b); }
template <typename T> T &chmax(T &a, const T &b) { return a = std::max(a, b); }

template <class T> inline std::vector<T> unique(std::vector<T> v) {
  sort(v.begin(), v.end());
  v.erase(unique(v.begin(), v.end()), v.end());
  return v;
}
// 初項s, 交差dのn個の数列の和
long long sum_of_arithmetic_progression(long long s, long long d, long long n) {
  return n * (2 * s + (n - 1) * d) / 2;
}

// 2のべき乗数かどうか
bool is_power_of_two(long long x) { return !(x & (x - 1)); }

// aとbの最大公約数 O(log min(a, b))
long long gcd(long long a, long long b) {
  if (b == 0) {
    return a;
  }
  return gcd(b, a % b);
}

// 数列vの最大公約数 O(N log d)
long long gcd(std::vector<long long> &v) {
  long long ans = v[0];
  for (int i = 1; i < (int)v.size(); ++i) {
    ans = gcd(ans, v[i]);
  }
  return ans;
}

// aとbの最小公倍数 O(log min(a, b))
long long lcm(long long a, long long b) {
  long long g = gcd(a, b);
  return a / g * b;
}

const int INF = 1 << 30;
const double EPS = 1e-9;
const long double PI = acos(-1.0);
const std::vector<int> dy2 = {0, 1}, dx2 = {1, 0}; // 右，下
const std::vector<int> dy4 = {0, -1, 0, 1},
                       dx4 = {1, 0, -1, 0}; // 右，上，左，下
const std::vector<int> dy8 = {0, -1, 0, 1, 1, -1, -1, 1},
                       dx8 = {1, 0, -1, 0, 1, 1, -1, -1};

using namespace std;

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

  LL N, W;
  cin >> N >> W;
  auto weight = make_v<LL>(N);
  auto value = make_v<LL>(N);
  FOR(i, 0, N) { cin >> weight[i] >> value[i]; }

  auto dp = make_v<LL>(N + 100, W + 100);
  FOR(i, 0, N) {
    FOR(j, 0, W + 1) {
      // use
      if (j + weight[i] <= W) {
        chmax(dp[i + 1][j + weight[i]], dp[i][j] + value[i]);
      }
      // not use
      chmax(dp[i + 1][j], dp[i][j]);
    }
  }
  LL ans = -INF;
  FOR(j, 0, W + 1) { chmax(ans, dp[N][j]); }
  print(ans);

  return 0;
}