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| #include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/hash_policy.hpp>
#define x first
#define y second
#define y1 Y1
#define y2 Y2
#define mp make_pair
#define pb push_back
using namespace std;
typedef long long LL;
typedef pair <int, int> pii;
template <typename T> inline int Chkmax (T &a, T b) { return a < b ? a = b, 1 : 0; }
template <typename T> inline int Chkmin (T &a, T b) { return a > b ? a = b, 1 : 0; }
template <typename T> inline T read ()
{
T sum = 0, fl = 1; char ch = getchar();
for (; !isdigit(ch); ch = getchar()) if (ch == '-') fl = -1;
for (; isdigit(ch); ch = getchar()) sum = (sum << 3) + (sum << 1) + ch - '0';
return sum * fl;
}
inline void proc_status ()
{
ifstream t ("/proc/self/status");
cerr << string (istreambuf_iterator <char> (t), istreambuf_iterator <char> ()) << endl;
}
const int Maxn = 1e5 + 100;
int BLOCK;
int N, M, P, Belong[Maxn], A[Maxn];
char S[Maxn];
struct query
{
int l, r, id;
} Q[Maxn];
inline int cmp (query a, query b)
{
if (Belong[a.l] == Belong[b.l]) return (Belong[a.l] & 1) ? (a.r < b.r) : (a.r > b.r);
return Belong[a.l] < Belong[b.l];
}
inline void Init ()
{
BLOCK = sqrt (N);
for (int i = 1; i <= N; ++i) Belong[i] = (i - 1) / BLOCK + 1;
sort (Q + 1, Q + M + 1, cmp);
}
namespace Sub1
{
inline void init ()
{
int sum = 0, pow10 = 1;
for (int i = N; i >= 1; --i)
{
sum = (sum + (LL) pow10 * (S[i] - '0') % P) % P;
A[i] = sum;
pow10 = (LL) pow10 * 10 % P;
}
}
__gnu_pbds :: gp_hash_table <int, LL> Map;
LL ans;
int Vis[Maxn];
inline void Update (int l, int r, int op)
{
if (op)
{
if (!Vis[r]) ++Map[A[r]], ans += Map[A[r + 1]];
else ans -= Map[A[r + 1]], --Map[A[r]];
Vis[r] ^= 1;
}
else
{
if (!Vis[l]) ans += Map[A[l]] + (A[l] == A[r + 1]), ++Map[A[l]];
else --Map[A[l]], ans -= Map[A[l]] + (A[l] == A[r + 1]);
Vis[l] ^= 1;
}
}
LL Ans[Maxn];
inline void solve ()
{
init ();
int l = 1, r = 0;
for (int i = 1; i <= M; ++i)
{
while (r < Q[i].r) Update (l, ++r, 1);
while (l > Q[i].l) Update (--l, r, 0);
while (r > Q[i].r) Update (l, r--, 1);
while (l < Q[i].l) Update (l++, r, 0);
Ans[Q[i].id] = ans;
}
for (int i = 1; i <= M; ++i) printf("%lld\n", Ans[i]);
}
}
namespace Sub2
{
inline void init ()
{
for (int i = 1; i <= N; ++i) A[i] = S[i] - '0';
}
LL ans, cnt;
int Vis[Maxn];
inline void Update (int l, int r, int op)
{
if (op)
{
if (!Vis[r]) { if (!(A[r] % P)) ans += r - l + 1, ++cnt; }
else { if (!(A[r] % P)) ans -= r - l + 1, --cnt; }
Vis[r] ^= 1;
}
else
{
if (!Vis[l]) cnt += !(A[l] % P), ans += cnt;
else ans -= cnt, cnt -= !(A[l] % P);
Vis[l] ^= 1;
}
}
LL Ans[Maxn];
inline void solve ()
{
init ();
int l = 1, r = 0;
for (int i = 1; i <= M; ++i)
{
while (r < Q[i].r) Update (l, ++r, 1);
while (l > Q[i].l) Update (--l, r, 0);
while (r > Q[i].r) Update (l, r--, 1);
while (l < Q[i].l) Update (l++, r, 0);
Ans[Q[i].id] = ans;
}
for (int i = 1; i <= M; ++i) printf("%lld\n", Ans[i]);
}
}
inline void Solve ()
{
Init ();
if (P != 2 && P != 5) Sub1 :: solve ();
else Sub2 :: solve ();
}
inline void Input ()
{
P = read<int>();
scanf("%s", S + 1); N = strlen(S + 1);
M = read<int>();
for (int i = 1; i <= M; ++i) Q[i].l = read<int>(), Q[i].r = read<int>(), Q[i].id = i;
}
int main()
{
#ifndef ONLINE_JUDGE
freopen("A.in", "r", stdin);
freopen("A.out", "w", stdout);
#endif
Input ();
Solve ();
return 0;
}
|