제출 #416268

#제출 시각아이디문제언어결과실행 시간메모리
416268DEQK경주 (Race) (IOI11_race)C++17
컴파일 에러
0 ms0 KiB
#include "race.h" #include <bits/stdc++.h> #define ll long long using namespace std; const int N = 200200; int ans = -1, d[N], K; ll len[N]; vector<pair<int, int>> g[N]; void calc(int u,int p,ll x = 0) { len[u] = x; for(auto to : g[u]) if(to.first != p) { d[to.first] = d[u] + 1; calc(to.first, u, x + to.second); } } map<int, int> dfs(int u,int p) { map<int, int> own; own[len[u]] = d[u]; for(auto to : g[u]) if(to.first != p) { auto x = dfs(to.first, u); if(x.size() > own.size()) { own.swap(x); } for(auto it : x) { if(own.count(K - it.first + 2 * len[u])) { if(ans == -1) { ans = own[K - it.first + 2 * len[u]] + it.second - 2 * d[u]; } else { ans = min(ans, own[K - it.first + 2 * len[u]] + it.second - 2 * d[u]); } } if(own.count(it.first)) { own[it.first] = min(own[it.first], it.second); } else { own[it.first] = it.second; } } } return own; } int best_path(int n, int k, vector<vector<int>> h, vector<int> l) { K = k; for(int i = 0; i < n - 1; i++) { int u = h[i][0],v = h[i][1], w = l[i]; g[u].push_back({v, w}); g[v].push_back({u, w}); } calc(0, -1); dfs(0, -1); return ans; }

컴파일 시 표준 에러 (stderr) 메시지

/usr/bin/ld: /tmp/ccs0QpOe.o: in function `main':
grader.cpp:(.text.startup+0x28): undefined reference to `best_path(int, int, int (*) [2], int*)'
collect2: error: ld returned 1 exit status