Submission #197518

#	Time	Username	Problem	Language	Result	Execution time	Memory
197518		handlename	Modsum (NOI12_modsum)	C++17	25 / 25	3 ms	504 KiB

modsum

#include <bits/stdc++.h>
using namespace std;
int sum[1001][5];
int main() {
    int n;
    cin>>n;
    sum[0][0]=1;
    for (int i=1;i<=n;i++){
        int a,b;
        cin>>a>>b;
        for (int j=a;j<=b;j++){
            int c=j%5;
            for (int k=0;k<5;k++){
                sum[i][k]+=sum[i-1][(k+c)%5];
            }
        }
    }
    int ans=0;
    for (int i=0;i<5;i++){
        ans+=sum[n][i]*(((i*i*i*i+2*i*i)%5)+1);
    }
    cout<<ans;
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 5 / 5
• Subtask 4: 5 / 5
• Subtask 5: 5 / 5