Cod sursa(job #2104993)

Utilizator BaldurCronos Baldur Data 12 ianuarie 2018 14:51:10
Problema 1-sir Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.77 kb
#include <cstdio>
#define N 256
#define MOD 194767
int dp[2][N * N + 1];

int abs(int x) {
        return (x < 0 ? -x : x);
}

int main() {
        freopen("1-sir.in", "r", stdin);
        freopen("1-sir.out", "w", stdout);
        int n, s, mx, line = 1;
        scanf("%d %d", &n, &s);
        mx = n * (n + 1) / 2;

        if (s > mx || s < -mx) {
                printf("0");
                return 0;
        }

        dp[0][0] = 1;
        for (int i = 2; i <= n; i++) {
                for (int j = 0; j <= mx; j++) {
                        dp[line][j] = (dp[1 - line][abs(j - (i - 1))] + dp[1 - line][abs(j + (i - 1))]) % MOD;
                }
                line = 1 - line;
        }

        printf("%d", dp[1 - line][s]);
        return 0;
}