제출 #1239072

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1239072		hainam2k9	Remittance (JOI19_remittance)	C++20	100 / 100	127 ms	16096 KiB

remittance

#include <bits/stdc++.h>
#define tt cin.tie(0), cout.tie(0), ios_base::sync_with_stdio(0)
#define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
#define ll long long
#define ull unsigned long long
#define i128 __int128
#define db long double
#define sz(a) ((int)(a).size())
#define pb emplace_back
#define pf emplace_front
#define pob pop_back
#define pof pop_front
#define lb lower_bound
#define ub upper_bound
#define fi first
#define se second
#define ins emplace
#define mp make_pair
using namespace std;
const int MOD = 1e9+7, MAXN = 1e6+5;
const string NAME = "";
int n;
ll cur=0,sum[2];
pair<ll,int> p[MAXN];
int main()
{
    tt;
    if(fopen((NAME + ".INP").c_str(), "r")) fo;
    cin >> n;
    for(int i = 1; i<=n; ++i)
        cin >> p[i].fi >> p[i].se, sum[0]+=p[i].fi, sum[1]+=p[i].se;
    if(sum[1]==0) return cout << (sum[0]==0 ? "Yes" : "No"), 0;
    bool ok=1;
    while(ok){
        ok=0;
        for(int i = 1; i<=n; ++i){
            p[i].fi+=cur;
            if(p[i].fi>p[i].se) ok=1, cur=(p[i].fi-p[i].se+1)/2;
            else cur=0;
            p[i].fi-=cur*2;
        }
    }
    for(int i = 1; i<=n; ++i)
        if(p[i].fi!=p[i].se) return cout << "No", 0;
    cout << "Yes";
}

컴파일 시 표준 에러 (stderr) 메시지

remittance.cpp: In function 'int main()':
remittance.cpp:3:19: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    3 | #define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
      |            ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
remittance.cpp:28:45: note: in expansion of macro 'fo'
   28 |     if(fopen((NAME + ".INP").c_str(), "r")) fo;
      |                                             ^~
remittance.cpp:3:63: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    3 | #define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
      |                                                        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
remittance.cpp:28:45: note: in expansion of macro 'fo'
   28 |     if(fopen((NAME + ".INP").c_str(), "r")) fo;
      |                                             ^~

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