Submission #258868

#	Time	Username	Problem	Language	Result	Execution time	Memory
258868		doowey	Remittance (JOI19_remittance)	C++14	100 / 100	297 ms	36472 KiB

remittance

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<int,int> pii;

#define fi first
#define se second
#define mp make_pair
#define fastIO ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);

const int N = (int)1e6 + 10;
ll A[N], B[N];

int main(){
    fastIO;
    int n;
    cin >> n;
    for(int i = 0 ; i < n ; i ++ ){
        cin >> A[i] >> B[i];
    }
    ll sa = 0, sb = 0;
    for(int i =0 ; i < n; i ++ )
        sa += A[i], sb += B[i];
    if(sb == 0){
        if(sa == 0){
            cout << "Yes\n";
        }
        else{
            cout << "No\n";
        }
        return 0;
    }
    ll t;
    bool h = true;
    while(h){
        h=false;
        for(int i = 0 ; i < n; i ++ ){
            if(A[i]>B[i]){
                t=(A[i]-B[i]+1)/2ll;
                A[i]-=2ll*t;
                A[(i+1)%n]+=t;
                h=true;
            }
        }
    }
    for(int i = 0 ; i < n; i ++ ){
        if(A[i] != B[i]){
            cout << "No\n";
            return 0;
        }
    }
    cout << "Yes\n";
    return 0;
}

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