Submission #367535

#	Time	Username	Problem	Language	Result	Execution time	Memory
367535		BartolM	Remittance (JOI19_remittance)	C++17	100 / 100	314 ms	36712 KiB

remittance

#include <bits/stdc++.h>

using namespace std;

#define X first
#define Y second
#define mp make_pair
#define pb push_back
typedef long long ll;
typedef pair <int, int> pii;
typedef pair <int, pii> pip;
typedef pair <pii, int> ppi;
typedef pair <ll, ll> pll;

const int INF=0x3f3f3f3f;
const int N=1e6+5;

int n;
ll A[N], B[N];
ll suma, sumb;

int main() {
    scanf("%d", &n);
    for (int i=0; i<n; ++i) {
        scanf("%lld %lld", A+i, B+i);
        sumb+=B[i]; suma+=A[i];
    }
    if (!sumb) {
        printf("%s\n", suma ? "No" : "Yes");
        return 0;
    }
    int ok=1;
    while (ok) {
        ok=0;
        for (int i=0; i<n; ++i) {
            if (A[i]<=B[i]) continue;
            ok=1;
            ll br=(A[i]-B[i]+1)/2;
            A[(i+1)%n]+=br;
            A[i]-=2*br;
        }
    }
    int res=1;
    for (int i=0; i<n; ++i) res&=A[i]==B[i];
    printf("%s\n", res ? "Yes" : "No");
    return 0;
}

Compilation message (stderr)

remittance.cpp: In function 'int main()':
remittance.cpp:23:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   23 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
remittance.cpp:25:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   25 |         scanf("%lld %lld", A+i, B+i);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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