Cod sursa(job #2073136)

Utilizator livliviLivia Magureanu livlivi Data 22 noiembrie 2017 19:00:39
Problema 1-sir Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.52 kb
#include<fstream>
#include<cmath>
#define N 256
#define M 194767
using namespace std;

ifstream cin("1-sir.in");
ofstream cout("1-sir.out");

int dp[N*N+1];

int main(){
    int n,s;
    cin>>n>>s;

    s=abs(s);
    s=n*(n-1)/2-s;

    if (s<0 ||(s&1)==1){
        cout<<'0';
        return 0;
    }

    s/=2;
    dp[0]=1;

    for(int i=1;i<n;i++)
        for(int j=s;j>=i;j--){
            dp[j]=dp[j]+dp[j-i]-M;
            if (dp[j]<0) dp[j]+=M;
        }

    cout<<dp[s];
    return 0;
}