Submission #743470

#	Time	Username	Problem	Language	Result	Execution time	Memory
743470		Mauve	Swapping Cities (APIO20_swap)	C++14	Compilation error	0 ms	0 KiB

swap

#include "swap.h"
#include<bits/stdc++.h>
#define pb push_back
#define ss second
#define ff first
using namespace std;
int l,r,i,j,ii,jj,k,n,m,mx,subtask=1;
vector< pair<int,int> > v[100000];
set< pair<int,int> > st;
void init(int N, int M, vector<int> U, vector<int> V, vector<int> W) {
    n=N;
    m=M;
    for(i=0;i<M;i++){
        v[U[i]].pb({V[i],W[i]});
        v[V[i]].pb({U[i],W[i]});
        mx=max(mx,W[i]);
        st.insert({W[i],V[i]});
    }
    for(i=0;i<n;i++) if(v[i].size()>2) subtask=2;
}
int getMinimumFuelCapacity(int X, int Y) {
    if(subtask==1){
        if(n>m) return -1;
        else return mx;
    }

    if(n<=3) return -1;
    if(X==0 || Y==0){
        if(Y==0) swap(X,Y);
        st.erase({v[Y][0].ss,Y});
        mx=v[Y][0].ss;
        mx=max(mx,*(++st.begin()).ss);
        st.insert({v[Y][0].ss,Y});
        return mx;
    }
    else{
    st.erase({v[X][0].ss,X});
    st.erase({v[Y][0].ss,Y});
    mx=max(v[X][0].ss,v[Y][0].ss);
    mx=max(mx,(*st.begin()).ff);
    st.insert({v[X][0].ss,X});
    st.insert({v[Y][0].ss,Y});
    return mx;
    }

}

Compilation message (stderr)

swap.cpp: In function 'int getMinimumFuelCapacity(int, int)':
swap.cpp:4:12: error: 'std::_Rb_tree_const_iterator<std::pair<int, int> >::_Self' has no member named 'second'
    4 | #define ss second
      |            ^~~~~~
swap.cpp:32:35: note: in expansion of macro 'ss'
   32 |         mx=max(mx,*(++st.begin()).ss);
      |                                   ^~