제출 #789931

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
789931		shoryu386	Advertisement 2 (JOI23_ho_t2)	C++17	100 / 100	70 ms	11284 KiB

Main

#include <bits/stdc++.h>

using namespace std;

#define int long long
//#define getchar_unlocked _getchar_nolock

inline int readint() {

  int x = 0;

  char ch = getchar_unlocked();

  while (ch < '0' || ch > '9')

    ch = getchar_unlocked();

  while (ch >= '0' && ch <= '9') {

    x = x * 10 + ch - '0';

    ch = getchar_unlocked();

  }

  return x;

}

main(){

    int n = readint();

    pair<int, int> arr[n];

    for (int x = 0; x < n; x++) arr[x].first = readint(), arr[x].second = readint(), arr[x] = make_pair(arr[x].first - arr[x].second, -(arr[x].first + arr[x].second));

    sort(arr, arr+n);

    int prevY = LLONG_MIN/10;

    int ans = 0;

    for (int x = 0; x < n; x++){
        arr[x].second = -arr[x].second;
        if (arr[x].second > prevY){

            ans++;

            prevY = arr[x].second;

        }

    }

    cout << ans;

    

}

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp:30:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   30 | main(){
      | ^~~~

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