Submission #846644

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
846644	2023-09-08 08:11:51	ttamx	Longest Trip (IOI23_longesttrip)	C++17	100 / 100	10 ms	860 KiB

longesttrip

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#include "longesttrip.h"
#include<bits/stdc++.h>
using namespace std;
int bsearch(vector<int> vec,vector<int> fixed){
    int l=0,r=vec.size()-1;
    while(l<r){
        int m=(l+r)/2;
        vector<int> res;
        for(int i=l;i<=m;i++)res.emplace_back(vec[i]);
        if(are_connected(res,fixed))r=m;
        else l=m+1;
    }
    return l;
}
vector<int> longest_trip(int N, int D){
    vector<int> path[2];
    for(int i=0;i<2;i++)path[i].emplace_back(i);
    bool ok=true;
    for(int i=2;i<N;i++){
        if(are_connected({i},{path[0].back()})){
            path[0].emplace_back(i);
            ok=true;
            continue;
        }
        if(!ok||are_connected({i},{path[1].back()})){
            path[1].emplace_back(i);
            ok=false;
 
 
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Compilation message (stderr)

longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:67:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |     for(int i=0;i<path[0].size();i++)ans.emplace_back(path[0][(id0+i+1)%path[0].size()]);
      |                 ~^~~~~~~~~~~~~~~
longesttrip.cpp:68:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |     for(int i=0;i<path[1].size();i++)ans.emplace_back(path[1][(id1+i)%path[1].size()]);
      |                 ~^~~~~~~~~~~~~~~

• Subtask 0: 0 / 0
• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 25 / 25
• Subtask 4: 60 / 60