Submission #1029080

#TimeUsernameProblemLanguageResultExecution timeMemory
1029080YassineBenYounesLongest Trip (IOI23_longesttrip)C++17
5 / 100
3049 ms344 KiB
#include<bits/stdc++.h> #include "longesttrip.h" typedef long long ll; typedef unsigned long long ull; typedef long double ld; typedef double db; ll gcd(ll a , ll b) {return b ? gcd(b , a % b) : a ;} // greatest common divisor (PGCD) ll lcm(ll a , ll b) {return (a * b) / gcd(a , b);} // least common multiple (PPCM) int dx[8] = {1, 0, 0, -1, 1, 1, -1, -1}; int dy[8] = {0, 1, -1, 0, 1, -1, -1, 1}; #define endl "\n" #define ss second #define ff first #define all(x) (x).begin() , (x).end() #define pb push_back #define vi vector<int> #define vii vector<pair<int,int>> #define vl vector<ll> #define vll vector<pair<ll,ll>> #define pii pair<int,int> #define pll pair<ll,ll> #define pdd pair<double,double> #define vdd vector<pdd> #define speed ios::sync_with_stdio(false);cin.tie(0);cout.tie(0); #include <ext/pb_ds/assoc_container.hpp> #include <ext/pb_ds/tree_policy.hpp> #define pbds tree<pii, null_type, less<pii>,rb_tree_tag, tree_order_statistics_node_update> using namespace __gnu_pbds; using namespace std; ////////////////////Only Clear Code////////////////////////// void usaco_problem(){ freopen("milkvisits.in", "r", stdin); freopen("milkvisits.out", "w", stdout); } void init(){ #ifndef ONLINE_JUDGE freopen("input.txt", "r", stdin); freopen("output.txt", "w", stdout); #endif // ONLINE_JUDGE } const int mx = 305; const int LOG = 22; const int inf = 1e9; const ll mod = 998244353; const int sq = 320; vi graph[mx]; bool vis[mx], q[mx]; vi res, ans; void dfs(int node){ q[node] = 1; ans.pb(node); if(ans.size() > res.size())res = ans; for(int adj : graph[node]){ if(q[adj])continue; dfs(adj); } ans.pop_back(); q[node] = 0; } vi longest_trip(int N, int D){ if(D == 3){ vi res; for(int i = 0; i < N;i++){ res.pb(i); } return res; } else{ for(int i = 0; i < N;i++){ graph[i].clear(); } for(int i = 0; i < N;i++){ for(int j = i+1;j < N;j++){ if(are_connected({i}, {j})){ graph[i].pb(j); graph[j].pb(i); } } } for(int i = 0; i < N;i++){ memset(vis, 0, sizeof vis); ans.clear(); dfs(i); } return res; } } /* int32_t main(){ init(); speed; } */ /* NEVER GIVE UP! DOING SMTHNG IS BETTER THAN DOING NTHNG!!! Your Guide when stuck: - Continue keyword only after reading the whole input - Don't use memset with testcases - Check for corner cases(n=1, n=0) - Check where you declare n(Be careful of declaring it globally and in main) */

Compilation message (stderr)

longesttrip.cpp: In function 'void usaco_problem()':
longesttrip.cpp:33:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |     freopen("milkvisits.in", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
longesttrip.cpp:34:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 |     freopen("milkvisits.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
longesttrip.cpp: In function 'void init()':
longesttrip.cpp:40:8: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 | freopen("input.txt", "r", stdin);
      | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
longesttrip.cpp:42:8: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 | freopen("output.txt", "w", stdout);
      | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
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