Submission #1230434

#	Time	Username	Problem	Language	Result	Execution time	Memory
1230434		nguyenvuminh0907	Art Exhibition (JOI18_art)	C++20	100 / 100	107 ms	15956 KiB

art

#include <bits/stdc++.h>
#define int long long
#define endl "\n"
using namespace std;

const int MAX = 5e5+2;
int n;
array<int, 2> f[MAX];
int x[MAX], y[MAX];

signed main(){
    ios_base::sync_with_stdio(0); cin.tie(0);

    #define FILENAME "task"
    if (fopen(FILENAME".inp", "r")){
        freopen(FILENAME".inp", "r", stdin);
        freopen(FILENAME".out", "w", stdout);
    }

    cin >> n;
    for (int i = 1; i <= n; ++i){
        int a, b;
        cin >> a >> b;
        f[i] = {a, b};
    }

    sort(f + 1, f + 1 + n);
    for (int i = 1, ps = 0; i <= n; ++i){
        y[i] = f[i][0] - ps;
        ps += f[i][1];
        x[i] = ps - f[i][0];
    }

    int ans = INT_MIN;
    for (int i = 1, maxY = INT_MIN; i <= n; ++i){
        maxY = max(maxY, y[i]);
        ans = max(ans, x[i] + maxY);
    }

    cout << ans;
}

Compilation message (stderr)

art.cpp: In function 'int main()':
art.cpp:16:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |         freopen(FILENAME".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
art.cpp:17:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |         freopen(FILENAME".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 50 / 50