Submission #961668

#	Time	Username	Problem	Language	Result	Execution time	Memory
961668		Unforgettablepl	Remittance (JOI19_remittance)	C++17	15 / 100	1 ms	604 KiB

remittance

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

#define int long long

const int modulo = 1e9+7;

int A[7];
int B[7];
int curr[7];
int arr[7];

int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int n;
    cin >> n;
    for(int i=0;i<n;i++)cin>>A[i]>>B[i];
    for(int start=0;start<=35;start++){
        arr[0]=start;
        bool works = true;
        for(int x=1;x<n;x++){
            arr[x]=arr[x-1]+A[x]-B[x];
            if(arr[x]<0)works=false;
            if(arr[x]&1)works=false;
            arr[x]/=2;
        }
        int backup = arr[n-1]+A[0]-B[0];
        if(backup&1)works=false;
        if(arr[0]!=backup/2)works=false;
        if(!works)continue;
        for(int x=0;x<n;x++)curr[x]=A[x];
        for(int rounds=1;rounds<10;rounds++){
            for(int x=0;x<n;x++){
                int uses = min(arr[x],curr[x]/2);
                curr[x]-=2*uses;
                arr[x]-=uses;
                curr[(x+1)%n]+=uses;
            }
        }
        for(int x=0;x<n;x++)if(curr[x]!=B[x])works=false;
        if(works){
            cout << "Yes\n";
            return 0;
        }
    }
    cout << "No\n";
}

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