Submission #233550

#	Time	Username	Problem	Language	Result	Execution time	Memory
233550		aggu_01000101	Remittance (JOI19_remittance)	C++14	0 / 100	5 ms	512 KiB

remittance

#include <bits/stdc++.h>
#define INF 10000000000000000
#define MOD 1000000017
#define mid(l, u) ((l+u)/2)
#define rchild(i) (i*2 + 2)
#define lchild(i) (i*2 + 1)
#define int long long
using namespace std;
signed main(){
    int n;
    cin>>n;
    int e[n];
    for(int i =0 ;i<n;i++){
        int a, b;
        cin>>a>>b;
        e[i] = (a-b);
    }
    int carry = 0;
    int lastchange = 0;
    int curriter = 0;
    for(int i = 0;true;i++, i%=n){
        int b = e[i];
        //cout<<i<<" "<<b<<" "<<carry<<endl;
        e[i]+=carry;
        carry = max((int)0, e[i]);
        if(carry%2) carry--;
        e[i]-=carry;
        carry/=2;
        curriter++;
        if(e[i]!=b) lastchange = curriter;

        if((curriter - lastchange)>n) break;
    }
    bool diff = false;
    for(int i = 0;i<n;i++) if(e[i]!=0) diff = true;
    if(diff) cout<<"No"<<endl;
    else cout<<"Yes"<<endl;

}
//l, mid(l, r) || l+1, r
//

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