Submission #522791

#	Time	Username	Problem	Language	Result	Execution time	Memory
522791		CPSC	Remittance (JOI19_remittance)	C++14	100 / 100	804 ms	28688 KiB

remittance

# include <bits/stdc++.h>
#define f first
#define s second
#define pb push_back
using namespace std;
const int N = 1e6 + 5;
int a[N],b[N],val,ff,n;
main() {
    cin>>n;
    int ff = 0;
    int ff1 = 0;
    for (int i = 1; i <= n; i++) {
        cin>>a[i]>>b[i];
        if (b[i] != 0) ff = 1;
        if (a[i] != 0) ff1 = 1;
    }
    if (!ff) {
        if (ff1) cout<<"No"<<endl; else cout<<"Yes"<<endl;
        return 0;
    }
    while (true) {
        ff = 0;
        for (int i = 1; i <= n; i++) {
            if (a[i] > b[i]) {
                val = (a[i] - b[i] + 1) / 2; val *= 2;
                if (i == n) {
                   
                    a[i] -= val;
                    a[1] += val/2;
                } else a[i] -= val, a[i + 1] += val / 2;
                ff = 1;
            }
        }
        if (!ff) break;
    }
    for (int i = 1; i <= n; i++) {
        if (a[i] != b[i]) {
            cout<<"No"<<endl; exit(0);
        }
    }
    cout<<"Yes"<<endl;
}

Compilation message (stderr)

remittance.cpp:8:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    8 | main() {
      | ^~~~

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