Cod sursa(job #2524494)

Utilizator dorufDoru Floare doruf Data 15 ianuarie 2020 20:09:28
Problema 1-sir Scor 0
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.52 kb
#include <bits/stdc++.h>
using namespace std;

ifstream fin("1-sir.in");
ofstream fout("1-sir.out");

const int N = 260;
const int Mod = 194767;

int n, s, v, dp[N * N];

int main()
{
	fin >> n >> s;

	int v = (s - (n * n - 1) / 2) / n;
	v = s - v * n;

	dp[0] = 1;
	for (int i = 1; i < n; ++i)
		for (int j = v; j >= 0; --j)
			dp[j] = (dp[j] + dp[j - i]) % Mod;

	fout << dp[v];
}


/**
	x + x + 1 + x + 2 + ... + x + n - 1 <= s
	nx + n*(n-1)/2 <= s
	nx <= s - n*(n-1)/2
	x <= (s - n*(n-1)/2) / n
**/