Submission #979549

#	Time	Username	Problem	Language	Result	Execution time	Memory
979549		vjudge1	Swapping Cities (APIO20_swap)	C++17	Compilation error	0 ms	0 KiB

swap

#include <time.h>
#include <cstdlib>
#include <stack>
#include <numeric>
#include <unordered_map>
#include <unordered_set>
#include <iomanip>
#include <map>
#include <set>
#include <iterator>
#include <deque>
#include <queue>
#include <sstream>
#include <array>
#include <string>
#include <tuple>
#include <chrono>
#include <cassert>
#include <cstdio>
#include <cstring>
#include <list>
#include <iostream>
#include <vector>
#include <cmath>
#include <algorithm>
#include <bitset>

using namespace std;

int tt = 1, n, m;
vector<pair<int, int>> g[200005];
pair<int, int> p[200005];
map<pair<int, int>, int> mp, pos;
set<pair<int, int>> st;
int main(){
    ios::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    cin >> n >> m;
    for(int i = 1; i <= m; i++){
        int a, b, c;
        cin >> a >> b >> c;
        a++;
        b++;
        g[a].push_back({b, c});
        g[b].push_back({a, c});
        mp[{a, b}] = c;
        mp[{b, a}] = c;

        pos[{a, b}] = i;
        pos[{b, a}] = i;

        st.insert({c, i});
    }
    cin >> tt;
    while(tt--){
        int x, y;
        cin >> x >> y;
        x++;
        y++;
        if(n <= 3){
            cout << -1 << "\n";
            continue;
        }
        
        int mx = 0;
        if(x != 1) mx = mp[{1, x}];
        if(y != 1) mx = max(mx, mp[{1, y}]);


        if(x != 1) st.erase({mp[{1, x}], pos[{1, x}]});
        if(y != 1) st.erase({mp[{1, y}], pos[{1, y}]});
        
        pair<int, int> p = *st.begin();
        st.erase(st.begin());
        if(x != 1 && y != 1)
            cout << max(mx, p.first) << "\n";
        else{
            pair<int, int> p1 = *st.begin();
            cout << max({mx, p.first, p1.first}) << "\n";
            st.insert(p1);
        }
        st.insert(p);
        if(x != 1) st.insert({mp[{1, x}], pos[{1, x}]});
        if(y != 1) st.insert({mp[{1, y}], pos[{1, y}]});
    }
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccXWBhqE.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccD5djoF.o:swap.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccXWBhqE.o: in function `main':
grader.cpp:(.text.startup+0x1c3): undefined reference to `init(int, int, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >)'
/usr/bin/ld: grader.cpp:(.text.startup+0x217): undefined reference to `getMinimumFuelCapacity(int, int)'
collect2: error: ld returned 1 exit status