제출 #866433

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
866433		yeediot	Advertisement 2 (JOI23_ho_t2)	C++14	100 / 100	139 ms	18108 KiB

Main

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define F first
#define S second
#define all(x) x.begin(),x.end()
#define pii pair<int,int>
#define pb push_back
#define sz(x) (int)(x.size())
#define chmin(x,y) x=min(x,y)
#define chmax(x,y) x=max(x,y)
#define vi vector<int>
#define vp vector<pii>
#define vvi vector<vi>
//Don't open the standings during contests.
void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}
bool cmp(pii a,pii b){
    if(b.S!=a.S)return a.S>b.S;
    return a.F>b.F;
}
signed main(){
    ios::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    int n;
    cin>>n;
    vector<pii>v;
    for(int i=0;i<n;i++){
        int a,b;
        cin>>a>>b;
        v.pb({b-a,b+a});
    }
    sort(all(v),cmp);
    int mx=-8e18;
    int ans=0;
    for(int i=0;i<n;i++){
        //cout<<v[i].F<<' '<<v[i].S<<'\n';
        if(v[i].F>mx){
            mx=v[i].F;
            ans++;
        }
    }
    cout<<ans<<'\n';
}
 /*
 input:
  if(x_i>x_j) e_j-x_j<=e_i-x_i
 */

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp: In function 'void setIO(std::string)':
Main.cpp:17:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:18:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 23 / 23
• Subtask 3: 36 / 36
• Subtask 4: 31 / 31