제출 #637822

#제출 시각아이디문제언어결과실행 시간메모리
637822erto경주 (Race) (IOI11_race)C++17
컴파일 에러
0 ms0 KiB
#include <bits/stdc++.h> #include "race.h" typedef long long int ll; #define INF (int)(1e9 + 7) #define INF2 998244353 #define N (ll)(2e5 + 5) using namespace std; #define int ll #define lsb(x) (x & (-x)) int n, k, g; int ans = INF; vector<pair<int, int>> v[N]; set<pair<int, int>> s[N]; int d[N]; int dis[N]; int h[N][2], l[N]; void dfs(int x, int p){ for(auto u : v[x]){ if(u.first != p){ d[u.first] = d[x] + 1; dis[u.first] = dis[x] + u.second; dfs(u.first, x); } } s[x].insert({dis[x], d[x]}); for(auto u : v[x]){ if(u.first != p){ if(s[x].size() < s[u.first].size()){ swap(s[x], s[u.first]); } for(auto j : s[u.first]){ if(x == 0){ cout << j.first << '\n'; } g = k - (j.first - dis[x]) + dis[x]; auto it = s[x].lower_bound(make_pair(g, 0ll)); if(it != s[x].end() && it->first == g){ ans = min(ans, j.second + it->second - 2 * d[x]); } s[x].insert(j); } } } s[x].insert({0, d[x]}); } int best_path(int nn, int K, int H[][2], int L[]){ n = nn; for(int i=0; i<n-1; i++){ v[h[i][0]].push_back({h[i][1], L[i]}); v[h[i][1]].push_back({h[i][0], L[i]}); } k=K; dfs(0, -1); if(ans == INF)return - 1; return ans; }

컴파일 시 표준 에러 (stderr) 메시지

/usr/bin/ld: /tmp/ccu8RMGN.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