Submission #528297

#	Time	Username	Problem	Language	Result	Execution time	Memory
528297		AdamGS	Remittance (JOI19_remittance)	C++17	100 / 100	392 ms	36404 KiB

remittance

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(a, b) for(int a = 0; a < (b); ++a)
const int LIM=1e6+7;
ll A[LIM], B[LIM];
int main() {
    ios_base::sync_with_stdio(0); cin.tie(0);
    ll n;
    cin >> n;
    rep(i, n) cin >> A[i] >> B[i];
    rep(i, 30) rep(j, n) if(A[j]>B[j]) {
        ll x=A[j]-B[j];
        x/=2;
        A[j]-=2*x;
        A[(j+1)%n]+=x;
    }
    bool ok1=true, ok2=true;
    ll ma=0;
    rep(i, n) {
        if(A[i]!=B[i]) ok1=false;
        if(A[i]!=B[i]+1) ok2=false;
        ma=max(ma, A[i]);
    }
    cout << (ok1||ok2&&ma>=2?"Yes":"No") << '\n';
}

Compilation message (stderr)

remittance.cpp: In function 'int main()':
remittance.cpp:25:22: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   25 |     cout << (ok1||ok2&&ma>=2?"Yes":"No") << '\n';
      |                   ~~~^~~~~~~

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