Submission #623728

#	Time	Username	Problem	Language	Result	Execution time	Memory
623728		Vladth11	Roads (CEOI20_roads)	C++14	Compilation error	0 ms	0 KiB

roads

#include <bits/stdc++.h>
#define C 1
#define P 0
#define debug(x) cerr << #x << " " << x << "\n"
#define debugs(x) cerr << #x << " " << x << " "

using namespace std;
typedef long long ll;
typedef pair <int, int> pii;
typedef pair <long double, pii> muchie;

const ll NMAX = 100001;
const ll VMAX = 101;
const ll INF = (1LL << 60);
const ll MOD = 1000000007;
const ll BLOCK = 447;
const ll base = 117;
const ll nr_of_bits = 18;
const ll inv2 = 500000004;

map <pii, pii> mp;
pii v[NMAX * 2];

struct ura{
    pii a, b;
};

vector <ura> sol;
map <pii, bool> scutit;

bool cmp(pii a, pii b){
    return {a.second, a.first} < {b.second, b.first};
}

int main() {
    //ifstream cin(".in");
    //ofstream cout(".out");
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n, i;
    cin >> n;
    for(i = 1; i <= n; i++){
        pii a, b;
        cin >> a.first >> a.second >> b.first >> b.second;
        mp[a] = b;
        mp[b] = a;
        v[i * 2 - 1] = a;
        v[i * 2] = b;
    }
    sort(v + 1, v + n * 2 + 1, cmp);
    for(i = 1; i <= n * 2; i++){
        int j;
        if(scutit[v[i]]) continue;
        int bun = 0;
        for(j = i - 1; j >= 1; j--){
            if(mp[v[i]] == v[j]) continue;
            bun = j;
        }
        j = bun;
        if(j == 0)
            continue;
        scutit[mp[v[i]]] = 1;
        scutit[mp[v[j]]] = 1;
        scutit[v[j]] = 1;
        sol.push_back({v[i], v[j]});
    }
    for(auto x : sol){
        cout << x.a.first << " " << x.a.second << " " << x.b.first << " " << x.b.second << "\n";
    }
    return 0;
}

Compilation message (stderr)

roads.cpp: In function 'bool cmp(pii, pii)':
roads.cpp:32:30: error: cannot convert '<brace-enclosed initializer list>' to 'bool' in return
   32 |     return {a.second, a.first} < {b.second, b.first};
      |                              ^
roads.cpp:32:31: error: expected ';' before '<' token
   32 |     return {a.second, a.first} < {b.second, b.first};
      |                               ^~
      |                               ;
roads.cpp:32:32: error: expected primary-expression before '<' token
   32 |     return {a.second, a.first} < {b.second, b.first};
      |                                ^
roads.cpp:32:34: error: expected primary-expression before '{' token
   32 |     return {a.second, a.first} < {b.second, b.first};
      |                                  ^