Submission #677915

#	Time	Username	Problem	Language	Result	Execution time	Memory
677915		qwerasdfzxcl	Remittance (JOI19_remittance)	C++17	55 / 100	222 ms	10452 KiB

remittance

#include <bits/stdc++.h>

typedef long long ll;
using namespace std;
int n;

void NO(){
    printf("No\n");
    exit(0);
}

int main(){
    scanf("%d", &n);
    vector<int> a, b;
    for (int i=0;i<n;i++){
        int x, y;
        scanf("%d %d", &x, &y);
        a.push_back(x);
        b.push_back(y);
    }

    ll q;
    for (int i=0;i<n;i++){
        if (!i){
            ll aS = 0, bS = 0;
            for (int j=0;j<n;j++){
                aS += (ll)a[j] * (1<<j);
                bS += (ll)b[j] * (1<<j);
            }

            if (aS!=0 && bS==0) NO();
            if (aS < bS) NO();
            if ((aS - bS) % ((1LL<<n)-1) != 0) NO();

            q = (aS-bS) / ((1LL<<n)-1);
        }

        else q = (q+a[i-1]-b[i-1])/2;

        if (q<0) NO();

        //rotate(a.begin(), a.begin()+1, a.end());
        //rotate(b.begin(), b.begin()+1, b.end());
    }

    printf("Yes\n");
    return 0;
}

Compilation message (stderr)

remittance.cpp: In function 'int main()':
remittance.cpp:13:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
remittance.cpp:17:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |         scanf("%d %d", &x, &y);
      |         ~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 15 / 15
• Subtask 2: 40 / 40
• Subtask 3: 0 / 45