//Never stop trying
/*#pragma GCC target ("avx2")
#pragma GCC optimize ("Ofast")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")*/
#include "bits/stdc++.h"
using namespace std;
#define boost ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)
typedef long long ll;
typedef string str;
typedef double db;
typedef long double ld;
typedef pair<int, int> pi;
#define fi first
#define se second
typedef vector<int> vi;
typedef vector<pi> vpi;
typedef vector<str> vs;
typedef vector<ld> vd;
#define pb push_back
#define eb emplace_back
#define sz(x) (int)x.size()
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
#define endl "\n"
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
const int MOD = 1e9 + 7; //998244353
const ll INF = 1e18;
const int MX = 1e5 + 10;
const int nx[4] = {0, 0, 1, -1}, ny[4] = {1, -1, 0, 0}; //right left down up
template<class T> using V = vector<T>;
template<class T> bool ckmin(T& a, const T& b) { return a > b ? a = b, 1 : 0; }
template<class T> bool ckmax(T& a, const T& b) { return a < b ? a = b, 1 : 0; }
ll cdiv(ll a, ll b) { return a / b + ((a ^ b) > 0 && a % b); } // divide a by b rounded up
//constexpr int log2(int x) { return 31 - __builtin_clz(x); } // floor(log2(x))
mt19937 rng(chrono::system_clock::now().time_since_epoch().count());
//mt19937_64 rng(chrono::system_clock::now().time_since_epoch().count());
ll random(ll a, ll b){
return a + rng() % (b - a + 1);
}
#ifndef LOCAL
#define cerr if(false) cerr
#endif
#define dbg(x) cerr << #x << " : " << x << endl;
#define dbgs(x,y) cerr << #x << " : " << x << " / " << #y << " : " << y << endl;
#define dbgv(v) cerr << #v << " : " << "[ "; for(auto it : v) cerr << it << ' '; cerr << ']' << endl;
#define here() cerr << "here" << endl;
void IO() {
#ifdef LOCAL
freopen("input.txt", "r", stdin);
freopen("output.txt", "w", stdout);
#endif
}
#ifndef LOCAL
#include "crocodile.h"
#endif
int N;
vpi adj[MX];
vi val(MX);
void solve(int u, int p){
vi vec;
for(auto v: adj[u]) if(v.fi!=p){
solve(v.fi,u);
vec.pb(val[v.fi]+v.se);
}
sort(all(vec));
if(!sz(vec)) val[u]=0;
else val[u]=vec[1];
}
int travel_plan(int NN, int M, int R[][2], int L[], int K, int P[]){
N=NN;
FOR(i,0,N-1){
int u=R[i][0],v=R[i][1];
adj[u].pb({v,L[i]});
adj[v].pb({u,L[i]});
}
int r; FOR(i,0,N) if(sz(adj[i])>1){r=i; break;}
solve(r,r);
return val[r];
}
#ifdef LOCAL
int main() {
boost; IO();
int N,M,K; cin>>N>>M>>K;
int R[M][2],L[M];
FOR(i,0,M) cin>>R[i][0]>>R[i][1]>>L[i];
int P[K];
FOR(i,0,K) cin>>P[i];
cout << travel_plan(N,M,R,L,K,P) << endl;
return 0;
}
#endif
/* Careful!!!
.Array bounds
.Infinite loops
.Uninitialized variables / empty containers
.Multisets are shit
Some insights:
.Binary search
.Graph representation
.Write brute force code
.Change your approach
*/
Compilation message
crocodile.cpp: In function 'int travel_plan(int, int, int (*)[2], int*, int, int*)':
crocodile.cpp:91:6: warning: 'r' may be used uninitialized in this function [-Wmaybe-uninitialized]
91 | int r; FOR(i,0,N) if(sz(adj[i])>1){r=i; break;}
| ^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
3052 KB |
Output is correct |
| 2 |
Correct |
2 ms |
3052 KB |
Output is correct |
| 3 |
Correct |
3 ms |
3052 KB |
Output is correct |
| 4 |
Correct |
3 ms |
3180 KB |
Output is correct |
| 5 |
Correct |
3 ms |
3180 KB |
Output is correct |
| 6 |
Correct |
3 ms |
3180 KB |
Output is correct |
| 7 |
Correct |
3 ms |
3180 KB |
Output is correct |
| 8 |
Correct |
3 ms |
3180 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
3052 KB |
Output is correct |
| 2 |
Correct |
2 ms |
3052 KB |
Output is correct |
| 3 |
Correct |
3 ms |
3052 KB |
Output is correct |
| 4 |
Correct |
3 ms |
3180 KB |
Output is correct |
| 5 |
Correct |
3 ms |
3180 KB |
Output is correct |
| 6 |
Correct |
3 ms |
3180 KB |
Output is correct |
| 7 |
Correct |
3 ms |
3180 KB |
Output is correct |
| 8 |
Correct |
3 ms |
3180 KB |
Output is correct |
| 9 |
Incorrect |
4 ms |
3180 KB |
Output isn't correct |
| 10 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
3052 KB |
Output is correct |
| 2 |
Correct |
2 ms |
3052 KB |
Output is correct |
| 3 |
Correct |
3 ms |
3052 KB |
Output is correct |
| 4 |
Correct |
3 ms |
3180 KB |
Output is correct |
| 5 |
Correct |
3 ms |
3180 KB |
Output is correct |
| 6 |
Correct |
3 ms |
3180 KB |
Output is correct |
| 7 |
Correct |
3 ms |
3180 KB |
Output is correct |
| 8 |
Correct |
3 ms |
3180 KB |
Output is correct |
| 9 |
Incorrect |
4 ms |
3180 KB |
Output isn't correct |
| 10 |
Halted |
0 ms |
0 KB |
- |
