This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "longesttrip.h"
#include <bits/stdc++.h>
using namespace std;
/*
OBSERVE:
path meargen
hinten und vorne dazu
* - * *
* - *
*/
std::vector<int> longest_trip(int N, int D){
// vorraussetzung path[0].end nicht mit path[1].end verbunden
vector<int> path[2];
path[0].push_back(0);
for(int i=1; i<N; i++){
if(are_connected({*path[0].rbegin()}, {i})){
path[0].push_back(i);
if(path[1].size() and are_connected({path[0][path[0].size()-1]}, {path[1][path[1].size()-1]})){
reverse(path[1].begin(), path[1].end());
path[0].insert(path[0].end(), path[1].begin(), path[1].end());
path[1].clear();
}
}else{
path[1].push_back(i);
}
}
if(path[1].empty() or not are_connected(path[0], path[1])){
if(path[0].size() > path[1].size())
return path[0];
return path[1];
}
if(are_connected({path[0][0]}, {path[1][0]})){
reverse(path[0].begin(), path[0].end());
path[0].insert(path[0].end(), path[1].begin(), path[1].end());
return path[0];
}
if(are_connected({path[0][0]}, {path[1][path[1].size()-1]})){
path[1].insert(path[1].end(), path[0].begin(), path[0].end());
return path[1];
}
if(are_connected({path[0][path[0].size()-1]}, {path[1][0]})){
path[0].insert(path[0].end(), path[1].begin(), path[1].end());
return path[0];
}
// jetzt wissen wir das path[0].begin - path[0].end
// jetzt wissen wir das path[1].begin - path[1].end
// und die pfade sind nicht disjoint
}
Compilation message (stderr)
longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:66:1: warning: control reaches end of non-void function [-Wreturn-type]
66 | }
| ^
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