Submission #706578

#	Time	Username	Problem	Language	Result	Execution time	Memory
706578		guagua0407	Roads (CEOI20_roads)	C++17	0 / 100	1 ms	340 KiB

roads

#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define f first
#define s second
#define all(x) x.begin(),x.end() 
#define _ ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}
#define pll pair<ll,ll>

int main() {_
    //setIO("wayne");
    int n;
    cin>>n;
    pair<pll,pll> num[n];
    for(int i=0;i<n;i++){
        int a,b,c,d;
        cin>>a>>b>>c>>d;
        num[i]={{a,b},{c,d}};
        if(num[i].f>num[i].s) swap(num[i].f,num[i].s);
    }
    sort(num,num+n);
    for(int i=0;i<n-1;i++){
        cout<<num[i].f.f<<' '<<num[i].f.s<<' '<<num[i+1].s.f<<' '<<num[i+1].s.s<<'\n';
    }
    return 0;
}
//maybe its multiset not set

Compilation message (stderr)

roads.cpp: In function 'void setIO(std::string)':
roads.cpp:12:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
roads.cpp:13:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 0
• Subtask 2: 0 / 15
• Subtask 3: 0 / 15
• Subtask 4: 0 / 15
• Subtask 5: 0 / 15
• Subtask 6: 0 / 40