Submission #685907

#	Time	Username	Problem	Language	Result	Execution time	Memory
685907		Alihan_8	Trampoline (info1cup20_trampoline)	C++17	43 / 100	522 ms	1048576 KiB

trampoline

#include <bits/stdc++.h>
// include <ext/pb_ds/assoc_container.hpp>
// include <ext/pb_ds/tree_policy.hpp>
// using namespace __gnu_pbds;
using namespace std;
#define all(x) x.begin(), x.end()
#define pb push_back
// define ordered_set tree<int,null_type,less_equal<int>,rb_tree_tag,tree_order_statistics_node_update>
#define mpr make pair
#define ln '\n'
void IO(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
#define int long long
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    int r, c, n; cin >> r >> c >> n;
    set <int> st[r];
    for ( int i = 1; i <= n; i++ ){
        int x, y; cin >> x >> y;
        st[--x].insert(--y);
    }
    int t; cin >> t;
    while ( t-- ){
        int xs, ys, xe, ye;
        cin >> xs >> ys >> xe >> ye;
        if ( xs > xe ){
            cout << "No\n";
            continue;
        }
        xs--, xe--, ys--, ye--;
        bool flag = true;
        while ( xs < xe ){
            auto it = st[xs].lower_bound(ys);
            if ( it == st[xs].end() or *it > ye ){
                flag = false;
                break;
            }
            ys = *it;
            xs++;
        }
        if ( flag ) cout << "Yes\n";
        else cout << "No\n";
    }

    cout << '\n';
}

Compilation message (stderr)

trampoline.cpp: In function 'void IO(std::string)':
trampoline.cpp:11:29: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 | void IO(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
trampoline.cpp:11:70: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 | void IO(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                                                               ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 23 / 23
• Subtask 2: 20 / 20
• Subtask 3: 0 / 11
• Subtask 4: 0 / 19
• Subtask 5: 0 / 27