Submission #313869

#	Time	Username	Problem	Language	Result	Execution time	Memory
313869		BeanZ	Untitled (POI11_tem)	C++14	100 / 100	271 ms	18808 KiB

Main

// I_Love_LPL
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define endl '\n'
const int N = 2e6 + 5;
ll x[N], y[N];
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    if (fopen("A.inp", "r")){
        freopen("test.inp", "r", stdin);
        freopen("test.out", "w", stdout);
    }
    ll n;
    cin >> n;
    for (int i = 1; i <= n; i++){
        cin >> y[i] >> x[i];
    }
    deque<ll> dq;
    ll ans = 1, pos = 0;
    for (int i = 1; i <= n; i++){
        while (dq.size()){
            if (y[i] >= y[dq.back()]) dq.pop_back();
            else break;
        }
        dq.push_back(i);
        while (dq.size()){
            if (y[dq.front()] > x[i]){
                pos = dq.front();
                dq.pop_front();
            } else break;
        }
        ans = max(ans, i - pos);
    }
    cout << ans;
}
/*
*/

Compilation message (stderr)

tem.cpp: In function 'int main()':
tem.cpp:12:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   12 |         freopen("test.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
tem.cpp:13:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   13 |         freopen("test.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 8 / 8
• Subtask 3: 8 / 8
• Subtask 4: 8 / 8
• Subtask 5: 8 / 8
• Subtask 6: 8 / 8
• Subtask 7: 8 / 8
• Subtask 8: 8 / 8
• Subtask 9: 9 / 9
• Subtask 10: 9 / 9
• Subtask 11: 9 / 9
• Subtask 12: 9 / 9