제출 #1298288

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1298288		daotuankhoi	송금 (JOI19_remittance)	C++20	0 / 100	1 ms	576 KiB

remittance

#include <bits/stdc++.h>

using namespace std;

#define fi first
#define se second
#define ll long long

#ifdef LOCAL
#include "algo/debug.h"
#else
#define debug(...) 42
#endif

template <class T> bool ckmax(T &a, T b) { return a < b ? (a = b, true) : false; }
template <class T> bool ckmin(T &a, T b) { return a > b ? (a = b, true) : false; }

const int MAXN = 1e6 + 5;
int a[MAXN], b[MAXN];
int main() {
    #define NAME "test"
    if (fopen(NAME".inp", "r")) {
        freopen(NAME".inp", "r", stdin);
        freopen(NAME".out", "w", stdout);
    }
    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];
    }
    int t = 50;
    while (t--) {
        for (int i = 0; i < n; i++) {
            int rem = a[i] - b[i];
            if (rem <= 0) continue;
            if (rem & 1) rem++;
            a[i] -= rem;
            a[(i + 1) % n] += rem / 2;
        }
    }
    for (int i = 0; i < n; i++) {
        if (a[i] != b[i]) return cout << "No\n", 0;
    }
    cout << "Yes\n";
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

remittance.cpp: In function 'int main()':
remittance.cpp:23:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |         freopen(NAME".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
remittance.cpp:24:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |         freopen(NAME".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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