Cod sursa(job #2939999)

Utilizator TeoRoGaming_YgVoinea Ionut-Florin TeoRoGaming_Yg Data 14 noiembrie 2022 17:20:44
Problema 1-sir Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.68 kb
#include <bits/stdc++.h>

using namespace std;

ifstream f ("1-sir.in");
ofstream g ("1-sir.out");

const int MOD = 194767;

int n, s, x;

int dp[2][32641];

int main()
{
    f >> n >> s;
    if(s > n * (n + 1) / 2 || -n * (n + 1) / 2 > s)
    {
        g << 0;
        return 0;
    }
    dp[1][0] = 1;
    for(int i = 2; i <= n; i++)
    {
        for(int j = 0; j < i - 1; j++)
            dp[i % 2][j] = (dp[(i - 1) % 2][i - 1 - j] + dp[(i - 1) % 2][j + i - 1]) % MOD;
        for(int j = i - 1; j <= i * (i - 1) / 2; j++)
            dp[i % 2][j] = (dp[(i - 1) % 2][j - i + 1] + dp[(i - 1) % 2][j + i - 1]) % MOD;
    }
    g << dp[n % 2][abs(s)];
    return 0;
}