Submission #1193575

#	Time	Username	Problem	Language	Result	Execution time	Memory
1193575		cpdreamer	Swapping Cities (APIO20_swap)	C++20	7 / 100	2092 ms	16936 KiB

swap

#include "swap.h"
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const long double EPS = 1e-9;
const ll MOD=998244353;
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
typedef tree<int,null_type,greater<int>,rb_tree_tag,
        tree_order_statistics_node_update> indexed_set;
void file(){
    freopen("input.txt.txt","r",stdin);
    freopen("output.txt.txt","w",stdout);
}
#define pb push_back
#define P pair
#define S second
#define F first
#define all(v) v.begin(),v.end()
multiset<int>st;
int w[(int)1e5+1];
vector<P<int,int>>adj[(int)1e5+1];
int n,m;
void init(int N, int M,
          std::vector<int> U, std::vector<int> V, std::vector<int> W) {
    n=N,m=M;
    for(auto u:W)
        st.insert(u);
    for(int i=0;i<M;i++){
        adj[U[i]].pb({V[i],W[i]});
        adj[V[i]].pb({U[i],W[i]});
    }
    for(int i=1;i<N;i++){
        w[i]=adj[i][0].S;
    }
}

int getMinimumFuelCapacity(int X, int Y) {
    if(X>Y)swap(X,Y);
    int ans=0;
    int c=3;
    vector<int>chosen;
    if(X!=0){
        ans=max(ans,w[X]);
        chosen.pb(w[X]);
        auto it=st.find(w[X]);
        st.erase(it);
        c--;
    }
    if(Y!=0){
        ans=max(ans,w[Y]);
        chosen.pb(w[Y]);
        auto it=st.find(w[Y]);
        st.erase(it);
        c--;
    }
    while(c--){
        if(st.empty())return -1;
        auto it=st.begin();
        ans=max(ans,*it);
        chosen.pb(*it);
        st.erase(it);
    }
    for(auto u:chosen){
        st.insert(u);
    }
    return ans;
}

Compilation message (stderr)

swap.cpp: In function 'void file()':
swap.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("input.txt.txt","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
swap.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("output.txt.txt","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 6
• Subtask 2: 7 / 7
• Subtask 3: 0 / 17
• Subtask 4: 0 / 20
• Subtask 5: 0 / 23
• Subtask 6: 0 / 27