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Cod sursa(job #17613)
#include <stdio.h>
#include <string.h>
#define NMAX 210
#define MOD 30103
int K, A, B, N;
char a[NMAX];
char aux[NMAX];
int ua[10][NMAX];
int ant[NMAX][110];
int cur[NMAX][110];
int sol[NMAX];
#include <set>
#include <string>
using namespace std;
set <string> H;
string kkt;
void back(int k, int last, int mod)
{
if (k == B + 1) return;
if (A <= k && k <= B && !mod) {
kkt.clear();
for (int j = 0; j < k; j++) kkt.push_back(sol[j] + '0');
H.insert(kkt);
}
int i;
for (i = last + 1; i < N; i++) {
if (k == 0 && a[i] == '0') continue;
sol[k] = a[i] - '0';
back(k + 1, i, (mod * 10 + a[i] - '0') % K);
}
}
int main()
{
int i, j, k, cant, ra;
freopen("diviz.in", "r", stdin);
freopen("diviz.out", "w", stdout);
scanf("%d %d %d", &K, &A, &B);
scanf("%s", a);
N = strlen(a);
// back(0, -1, 0);
// printf("%d\n", (int) H.size());
for (i = 0; i < N; i++) aux[N - i - 1] = a[i];
memcpy(a, aux, sizeof(a));
for (N = 0; a[N]; N++)
ua[a[N] - '0'][N + 1] = N + 1;
for (i = 1; i <= N; i++)
for (j = 0; j < 10; j++)
if (!ua[j][i]) ua[j][i] = ua[j][i - 1];
int c, mod = 1;
int rez = 0;
for (i = 1; i <= B && i <= N; i++) {
for (j = i; j <= N; j++) {
c = a[j-1] - '0';
if (i == 1) {
cur[j][c % K] = 1;
continue;
}
for (k = 0; k < K; k++) {
for (cant = 0; cant < 10; cant++) {
if (!ua[cant][j - 1]) continue;
ra = k - c * mod;
ra %= K;
if (ra < 0) ra += K;
cur[j][k] += ant[ ua[cant][j - 1] ][ra];
if (cur[j][k] >= MOD) cur[j][k] -= MOD;
}
}
}
/* for (j = 1; j <= N; j++) {
for (k = 0; k < K; k++) printf("%d ", cur[j][k]);
printf("\n");
}
printf("\n");
*/
if (A <= i) {
for (j = 1; j < 10; j++) {
if (ua[j][N]) rez += cur[ ua[j][N] ][0];
if (rez >= MOD) rez -= MOD;
}
}
memcpy(ant, cur, sizeof(cur));
memset(cur, 0, sizeof(cur));
mod *= 10; mod %= K;
}
printf("%d\n", rez);
fclose(stdin);
fclose(stdout);
return 0;
}