Submission #17754764

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Source Code Expand

#include <bits/stdc++.h>
#define rep(i, n) for (long i = 1; i <= (long)(n); i++)
using namespace std;

int main(void){
    long A, B, C;
    long DIV = 998244353;
    long sumABC = 0;
    long sumBC = 0;
    long sumA = 0;
    long sumB = 0;
    long sumC = 0;

    cin >> A >> B >> C;

    if(C%2 ==0){
        sumC = (1+C)*C/2;
    }
    else{
        sumC = (1+C)/2*C;
    }
    sumC %= DIV;

    if(B%2 ==0){
        sumB = (1+B)*B/2;
    }
    else{
        sumB = (1+B)/2*B;
    }
    sumB %= DIV;

    if(A%2 ==0){
        sumA = (1+A)*A/2;
    }
    else{
        sumA = (1+A)/2*A;
    }
    sumA %= DIV;

    sumBC = sumB * sumC;
    sumBC %= DIV;
    sumABC = sumA * sumBC;
    sumABC %= DIV;

    cout << sumABC << endl;
}

Submission Info

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