Language: C++

	ll DP[N + 1][P] = {};#include <bits/stdc++.h>
#include <stdio.h>
#include <iostream>
#include <cstdio>
#include <bitset>
#include <algorithm>
#include <vector>
#include <list>
#include <queue>
#include <stack>
#include <string>
#include <string.h>
#include <cmath>
#include <utility>
#include <functional>
#include <map>
#include <set>
#include <cctype>
#include <fstream>
#include <numeric>
#include <iomanip>
#include <cstring>
using namespace std;
using ll = long long;
#define ALL(a) (a).begin(), (a).end()

#define FOR(i, a, b) for (long long int i = (a); i <= (b); i++)
#define RFOR(i, a, b) for (long long int i = (a); i >= (b); i--)
#define MOD 1000000007
#define LLONG_MAXs 9223372036854775800 / 2
//#define bit(n, k) ((n >> k) & 1) /*nのk bit目*/
#define ALL(a) (a).begin(), (a).end()

#include <iostream>
#include <cmath>
using namespace std;

bool isPrimeNum(ll x)
{ // 素数である場合 true を返す
	if (x <= 1)
	{ // 1以下である場合は素数でないことがすぐにわかる
		return false;
	}
	// sqrt( double型 ) は引数の平方根を double型で返すので、int型でキャスト
	int n = (int)sqrt((double)x);
	for (int i = 2; i <= n; i++)
	{
		if (x % i == 0)
		{ // 割り切る整数がある場合、即判定終了
			return false;
		}
	}
	return true; // 割り切る整数がない場合、素数である
}

ll myPow(ll x, ll n, ll m)
{
	if (n == 0)
		return 1;
	if (n % 2 == 0)
		return myPow(x * x % m, n / 2, m);
	else
		return x * myPow(x, n - 1, m) % m;
}

constexpr ll gcd(ll a, ll b) { return b ? gcd(b, a % b) : a; }
constexpr ll lcm(ll a, ll b) { return a * b / gcd(a, b); }
constexpr ll abs(ll a, ll b)
{
	if (a >= b)
		return a - b;
	if (a < b)
		return b - a;
}
constexpr double dabs(double a, double b)
{
	if (a >= b)
		return a - b;
	if (a < b)
		return b - a;
}
constexpr ll min(ll a, ll b)
{
	if (a >= b)
		return b;
	if (a < b)
		return a;
}

constexpr ll max(ll a, ll b)
{
	if (a >= b)
		return a;
	if (a < b)
		return b;
}

int dx[4] = {1, 0, -1, 0};
int dy[4] = {0, 1, 0, -1};

int dx8[8] = {1, 0, -1, 0, 1, -1, 1, -1};
int dy8[8] = {0, 1, 0, -1, 1, 1, -1, -1};

class UnionFind
{
public:
	//親の番号を格納する。親だった場合は-(その集合のサイズ)
	vector<int> Parent;

	//作るときはParentの値を全て-1にする
	//こうすると全てバラバラになる
	UnionFind(int N)
	{
		Parent = vector<int>(N, -1);
	}

	//Aがどのグループに属しているか調べる
	int root(int A)
	{
		if (Parent[A] < 0)
			return A;
		return Parent[A] = root(Parent[A]);
	}

	//自分のいるグループの頂点数を調べる
	int size(int A)
	{
		return -Parent[root(A)]; //親をとってきたい]
	}
	bool issame(int x, int y)
	{
		return root(x) == root(y);
	}
	//AとBをくっ付ける
	bool connect(int A, int B)
	{
		//AとBを直接つなぐのではなく、root(A)にroot(B)をくっつける
		A = root(A);
		B = root(B);
		if (A == B)
		{
			//すでにくっついてるからくっ付けない
			return false;
		}

		//大きい方(A)に小さいほう(B)をくっ付けたい
		//大小が逆だったらひっくり返しちゃう。
		if (size(A) < size(B))
			swap(A, B);

		//Aのサイズを更新する
		Parent[A] += Parent[B];
		//Bの親をAに変更する
		Parent[B] = A;

		return true;
	}
};

long long fac[510000], finv[510000], inv[510000];

// テーブルを作る前処理
void COMinit()
{
	fac[0] = fac[1] = 1;
	finv[0] = finv[1] = 1;
	inv[1] = 1;
	for (int i = 2; i < 510000; i++)
	{
		fac[i] = fac[i - 1] * i % MOD;
		inv[i] = MOD - inv[MOD % i] * (MOD / i) % MOD;
		finv[i] = finv[i - 1] * inv[i] % MOD;
	}
}

// 二項係数計算
long long COM(int n, int k)
{
	if (n < k)
		return 0;
	if (n < 0 || k < 0)
		return 0;
	return fac[n] * (finv[k] * finv[n - k] % MOD) % MOD;
}

long long modinv(long long a, long long m)
{
	long long b = m, u = 1, v = 0;
	while (b)
	{
		long long t = a / b;
		a -= t * b;
		swap(a, b);
		u -= t * v;
		swap(u, v);
	}
	u %= m;
	if (u < 0)
		u += m;
	return u;
}

void yn(bool flag)
{
	if (flag)
	{
		cout << "Yes" << endl;
	}
	else
	{
		cout << "No" << endl;
	}
	return;
}
void YN(bool flag)
{
	if (flag)
	{
		cout << "YES" << endl;
	}
	else
	{
		cout << "NO" << endl;
	}
	return;
}

std::vector<ll> enum_div(ll n) //nの約数を列挙
{
	std::vector<ll> ret;
	for (ll i = 1; i * i <= n; ++i)
	{
		if (n % i == 0)
		{
			ret.push_back(i);
			if (i != 1 && i * i != n)
			{
				ret.push_back(n / i);
			}
		}
	}
	ret.push_back(n);
	return ret;
}

// グラフセット
struct Edge
{
	ll to;	 // 辺の行き先
	ll weight; // 辺の重み
	Edge(int t, int w) : to(t), weight(w) {}
};
using Graph = vector<vector<ll>>;
#define def 0
template <class V, int NV>
struct SegTree
{ //[l,r)
	V comp(V &l, V &r) { return max(l, r); };

	vector<V> val;
	SegTree() { val = vector<V>(NV * 2, def); }
	V get(int x, int y, int l = 0, int r = NV, int k = 1)
	{
		if (r <= x || y <= l)
			return def;
		if (x <= l && r <= y)
			return val[k];
		auto a = get(x, y, l, (l + r) / 2, k * 2);
		auto b = get(x, y, (l + r) / 2, r, k * 2 + 1);
		return comp(a, b);
	}
	void update(int i, V v)
	{
		i += NV;
		val[i] = v;
		while (i > 1)
			i >>= 1, val[i] = comp(val[i * 2], val[i * 2 + 1]);
	}
	void add(int i, V v) { update(i, val[i + NV] + v); }
	V operator[](int x) { return get(x, x + 1); }
};

typedef vector<vector<long long>> matrix;
matrix mul_mod(matrix A, matrix B)
{
	int H = A.size();
	int W = B[0].size();
	int K = A[0].size();

	matrix C(H, vector<ll>(W, 0));
	for (int i = 0; i < H; i++)
	{
		for (int j = 0; j < W; j++)
		{
			for (int k = 0; k < K; k++)
			{
				C[i][j] += A[i][k] * B[k][j];
				C[i][j] %= MOD;
			}
		}
	}
	return C;
}
matrix pow_mod_matrix(matrix A, ll p)
{
	matrix ret = matrix(A.size(), vector<long long>(A.size(), 0));
	for (int i = 0; i < A.size(); i++)
		ret[i][i] = 1;

	while (p > 0)
	{
		if (p & 1)
			ret = mul_mod(ret, A);
		A = mul_mod(A, A);
		p >>= 1;
	}
	return ret;
}
// 区間加算にも対応した BIT
template <class Abel>
struct BIT
{
	vector<Abel> dat[2];
	Abel UNITY_SUM = 0; // to be set

	/* [1, n] */
	BIT(int n) { init(n); }
	void init(int n)
	{
		for (int iter = 0; iter < 2; ++iter)
			dat[iter].assign(n + 1, UNITY_SUM);
	}

	/* a, b are 1-indexed, [a, b) */
	inline void sub_add(int p, int a, Abel x)
	{
		for (int i = a; i < (int)dat[p].size(); i += i & -i)
			dat[p][i] = dat[p][i] + x;
	}
	inline void add(int a, int b, Abel x)
	{
		sub_add(0, a, x * -(a - 1));
		sub_add(1, a, x);
		sub_add(0, b, x * (b - 1));
		sub_add(1, b, x * (-1));
	}

	/* a is 1-indexed, [a, b) */
	inline Abel sub_sum(int p, int a)
	{
		Abel res = UNITY_SUM;
		for (int i = a; i > 0; i -= i & -i)
			res = res + dat[p][i];
		return res;
	}
	inline Abel sum(int a, int b)
	{
		return sub_sum(0, b - 1) + sub_sum(1, b - 1) * (b - 1) - sub_sum(0, a - 1) - sub_sum(1, a - 1) * (a - 1);
	}

	/* debug */
	void print()
	{
		for (int i = 1; i < (int)dat[0].size(); ++i)
			cout << sum(i, i + 1) << ",";
		cout << endl;
	}
};
//cout << std::setprecision(30) << ans << endl;

int main()
{
	ll N, P, A;

	string S;
	ll ans = 0;
	cin >> S;

	ll DP[100001][100000] = {};

	FOR(i, 0, S.size() - 1)
	{
		ll ct = S[i] - '0';
		FOR(j, 0, P - 1)
		{
			DP[i + 1][(j * 10 + ct) % P] += DP[i][j];
		}
		DP[i + 1][(ct) % P]++;
		ans += DP[i + 1][0];
	}
	cout << ans << endl;
	return 0;
}

Compiler output:
a.cc:1:30: error: stray '#' in program
    1 |         ll DP[N + 1][P] = {};#include <bits/stdc++.h>
      |                              ^
a.cc:1:9: error: 'll' does not name a type
    1 |         ll DP[N + 1][P] = {};#include <bits/stdc++.h>
      |         ^~
a.cc:1:31: error: 'include' does not name a type
    1 |         ll DP[N + 1][P] = {};#include <bits/stdc++.h>
      |                               ^~~~~~~
In file included from /usr/include/wchar.h:53,
                 from /usr/include/c++/14/cwchar:44,
                 from /usr/include/c++/14/bits/postypes.h:40,
                 from /usr/include/c++/14/iosfwd:42,
                 from /usr/include/c++/14/ios:40,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:3:
/usr/include/x86_64-linux-gnu/bits/types/mbstate_t.h:6:9: error: '__mbstate_t' does not name a type
    6 | typedef __mbstate_t mbstate_t;
      |         ^~~~~~~~~~~
/usr/include/wchar.h:104:59: error: 'size_t' has not been declared
  104 |                          const wchar_t *__restrict __src, size_t __n)
      |                                                           ^~~~~~
/usr/include/wchar.h:109:8: error: 'size_t' does not name a type
  109 | extern size_t wcslcpy (wchar_t *__restrict __dest,
      |        ^~~~~~
/usr/include/wchar.h:61:1: note: 'size_t' is defined in header '<cstddef>'; this is probably fixable by adding '#include <cstddef>'
   60 | # include <bits/types/locale_t.h>
  +++ |+#include <cstddef>
   61 | #endif
/usr/include/wchar.h:115:8: error: 'size_t' does not name a type
  115 | extern size_t wcslcat (wchar_t *__restrict __dest,
      |        ^~~~~~
/usr/include/wchar.h:115:8: note: 'size_t' is defined in header '<cstddef>'; this is probably fixable by adding '#include <cstddef>'
/usr/include/wchar.h:126:59: error: 'size_t' has not been declared
  126 |                          const wchar_t *__restrict __src, size_t __n)
      |                                                           ^~~~~~
/usr/include/wchar.h:133:63: error: 'size_t' has not been declared
  133 | extern int wcsncmp (const wchar_t *__s1, const wchar_t *__s2, size_t __n)
      |                                                               ^~~~~~
/usr/include/wchar.h:142:25: error: 'size_t' has not been declared
  142 |                         size_t __n) __THROW;
      |                         ^~~~~~
/usr/include/wchar.h:150:27: error: 'size_t' has not been declared
  150 |                           size_t __n, locale_t __loc) __THROW;
      |                           ^~~~~~
/usr/include/wchar.h:159:8: error: 'size_t' does not name a type
  159 | extern size_t wcsxfrm (wchar_t *__restrict __s1,
      |        ^~~~~~
/usr/include/wchar.h:159:8: note: 'size_t' is defined in header '<cstddef>'; this is probably fixable by adding '#include <cstddef>'
/usr/include/wchar.h:174:8: error: 'size_t' does not name a type
  174 | extern size_t wcsxfrm_l (wchar_t *__s1, const wchar_t *__s2,
      |        ^~~~~~
/usr/include/wchar.h:174:8: note: 'size_t' is defined in header '<cstddef>'; this is probably fixable by adding '#include <cstddef>'
/usr/include/wchar.h:212:8: error: 'size_t' does not name a type
  212 | extern size_t wcscspn (const wchar_t *__wcs, const wchar_t *__reject)
      |        ^~~~~~
/usr/include/wchar.h:212:8: note: 'size_t' is defined in header '<cstddef>'; this is probably fixable by adding '#include <cstddef>'
/usr/include/wchar.h:216:8: error: 'size_t' does not name a type
  216 | extern size_t wcsspn (const wchar_t *__wcs, const wchar_t *__accept)
      |        ^~~~~~
/usr/include/wchar.h:216:8: note: 'size_t' is defined in header '<cstddef>'; this is probably fixable by adding '#include <cstddef>'
/usr/include/wchar.h:247:8: error: 'size_t' does not name a type
  247 | extern size_t wcslen (const wchar_t *__s) __THROW __attribute_pure__;
      |        ^~~~~~
/usr/include/wchar.h:247:8: note: 'size_t' is defined in header '<cstddef>'; this is probably fixable by adding '#include <cstddef>'
/usr/include/wchar.h:265:8: error: 'size_t' does not name a type
  265 | extern size_t wcsnlen (const wchar_t *__s, size_t __maxlen)
      |        ^~~~~~
/usr/include/wchar.h:265:8: note: 'size_t' is defined in header '<cstddef>'; this is probably fixable by adding '#include <cstddef>'
/usr/include/wchar.h:272:59: error: 'size_t' has not been declared
  272 | extern "C++" wchar_t *wmemchr (wchar_t *__s, wchar_t __c, size_t __n)
      |                                                           ^~~~~~
/usr/include/wchar.h:275:38: error: 'size_t' has not been declared
  275 |                                      size_t __n)
      |                                      ^~~~~~
/usr/include/wchar.h:283:63: error: 'size_t' has not been declared
  283 | extern int wmemcmp (const wchar_t *__s1, const wchar_t *__s2, size_t __n)
      |                                                               ^~~~~~
/usr/include/wchar.h:288:58: error: 'size_t' has not been declared
  288 |                          const wchar_t *__restrict __s2, size_t __n) __THROW;
      |                                                          ^~~~~~
/usr/include/wchar.h:292:63: error: 'size_t' has not been declared
  292 | extern wchar_t *wmemmove (wchar_t *__s1, const wchar_t *__s2, size_t __n)
      |                                                               ^~~~~~
/usr/include/wchar.h:296:53: error: 'size_t' has not been declared
  296 | extern wchar_t *wmemset (wchar_t *__s, wchar_t __c, size_t __n) __THROW;
      |                                                     ^~~~~~
/usr/include/wchar.h:302:59: error: 'size_t' has not been declared
  302 |                           const wchar_t *__restrict __s2, size_t __n)
      |                                                           ^~~~~~
/usr/include/wchar.h:317:27: error: 'mbstate_t' does not name a type
  317 | extern int mbsinit (const mbstate_t *__ps) __THROW __attribute_pure__;
      |                           ^~~~~~~~~
/usr/include/wchar.h:321:8: error: 'size_t' does not name a type
  321 | extern size_t mbrtowc (wchar_t *__restrict __pwc,
      |        ^~~~~~
/usr/include/wchar.h:321:8: note: 'size_t' is defined in header '<cstddef>'; this is probably fixable by adding '#include <cstddef>'
/usr/include/wchar.h:326:8: error: 'size_t' does not name a type
  326 | extern size_t wcrtomb (char *__restrict __s, wchar_t __wc,
      |        ^~~~~~
/usr/include/wchar.h:326:8: note: 'size_t' is defined in header '<cstddef>'; this is probably fixable by adding '#include <cstddef>'
/usr/include/wchar.h:330:8: error: 'size_t' does not name a type
  330 | extern size_t __mbrlen (const char *__restrict __s, size_t __n,
      |        ^~~~~~
/usr/include/wchar.h:330:8: note: 'size_t' is defined in header '<cstddef>'; this is probably fixable by adding '#include <cstddef>'
/usr/include/wchar.h:332:8: error: 'size_t' does not name a type
  332 | extern size_t mbrlen (const char *__restrict __s, size_t __n,
      |        ^~~~~~
/usr/include/wchar.h:332:8: note: 'size_t' is defined in header '<cstddef>'; this is probably fixable by adding '#include <cstddef>'
/usr/include/wchar.h:362:8: error: 'size_t' does not name a type
  362 | extern size_t mbsrtowcs (wchar_t *__restrict __dst,
      |        ^~~~~~
/usr/include/wchar.h:362:8: note: 'size_t' is defined in header '<cstddef>'; this is probably fixable by adding '#include <cstddef>'
/usr/include/wchar.h:368:8: error: 'size_t' does not name a type
  368 | extern size_t wcsrtombs (char *__restrict __dst,
      |        ^~~~~~
/usr/include/wchar.h:368:8: note: 'size_t' is defined in header '<cstddef>'; this is probably fixable by adding '#include <cstddef>'
/usr/include/wchar.h:376:8: error: 'size_t' does not name a type
  376 | extern size_t mbsnrtowcs (wchar_t *__restrict __dst,
      |        ^~~~~~
/usr/include/wchar.h:376:8: note: 'size_t' is defined in header '<cstddef>'; this is probably fixable by adding '#include <cstddef>'
/usr/include/wchar.h:382:8: error: 'size_t' does not name a type
  382 | extern size_t wcsnrtombs (char *__restrict __dst,
      |        ^~~~~~
/usr/include/wchar.h:382:8: note: 'size_t' is defined in header '<cstddef>'; this is probably fixable by adding '#include <cstddef>'
/usr/include/wchar.h:396:42: error: 'size_t' has not been declared
  396 | extern int wcswidth (const wchar_t *__s, size_t __n) __THROW;
      |                                          ^~~~~~
/usr/include/wchar.h:695:59: error: 'size_t' has not been declared
  695 |                          const wchar_t *__restrict __src, size_t __n)
      |                                                           ^~~~~~
/usr/include/wchar.h:718:8: error: '__FILE' does not name a type; did you mean 'EMFILE'?
  718 | extern __FILE *open_wmemstream (wchar_t **__bufloc, size_t *__sizeloc) __THROW
      |        ^~~~~~
      |        EMFILE
/usr/include/wchar.h:725:19: error: '__FILE' was not declared in this scope; did you mean 'EMFILE'?
  725 | extern int fwide (__FILE *__fp, int __mode) __THROW;
      |                   ^~~~~~
      |                   EMFILE
/usr/include/wchar.h:725:27: error: '__fp' was not declared in this scope
  725 | extern int fwide (__FILE *__fp, int __mode) __THROW;
      |                           ^~~~
/usr/include/wchar.h:725:33: error: expected primary-expression before 'int'
  725 | extern int fwide (__FILE *__fp, int __mode) __THROW;
      |                                 ^~~
/usr/include/wchar.h:725:43: error: expression list treated as compound expression in initializer [-fpermissive]
  725 | extern int fwide (__FILE *__fp, int __mode) __THROW;
      |                                           ^
/usr/include/wchar.h:732:22: error: '__FILE' was not declared in this scope; did you mean 'EMFILE'?
  732 | extern int fwprintf (__FILE *__restrict __stream,
      |                      ^~~~~~
      |                      EMFILE
/usr/include/wchar.h:732:30: error: expected primary-expression before '__restrict'
  732 | extern int fwprintf (__FILE *__restrict __stream,
      |                              ^~~~~~~~~~
/usr/include/wchar.h:733:22: error: expect