Submission #1235766

#	Time	Username	Problem	Language	Result	Execution time	Memory
1235766		annn	Modsum (NOI12_modsum)	C++20	25 / 25	136 ms	512 KiB

modsum

#include <bits/stdc++.h>
using namespace std;

#define int long long
#define endl "\n"
#define pb push_back
#define ff first
#define ss second
#define ii pair<int, int>
#define vi vector<int>
#define vii vector<pair<int, int>>
#define vvi vector<vi>
#define mii map<int, int>
#define rep(i, a, b) for (int i = a; i <= b; i++)
#define _READ(name) freopen(name, "r", stdin)
#define _WRITE(name) freopen(name, "w", stdout)
const int INF = 4e18;
const int MOD = 1e9 + 7;

int n; const int mx = 1e3 + 3;
int u[mx], v[mx];
int ans = 0;
void Prepare() {
    cin >> n;
    rep(i, 1, n) cin >> u[i] >> v[i];
}

void ql(int i, int sum) {
	if (i > n) {
		int f = (sum*sum%5*sum%5*sum%5 + 2*sum%5*sum%5)%5+1;
		ans += f;
		return;
	}
	for (int j = u[i]; j <= v[i]; j++) {
		ql(i+1, (sum+j)%5);
	}
}

void COOOOK() {
	ql(1, 0);
}

void Eat() {
	cout << ans << endl;
}

void Wash() {

}

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr); cout.tie(nullptr);

    int TEST = 1;
    // cin >> TEST;
    while (TEST--) {
        Prepare();
        COOOOK();
        Eat();
        Wash();
    }

    return 0;

}

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