제출 #472968

#제출 시각아이디문제언어결과실행 시간메모리
472968ngpin04공장들 (JOI14_factories)C++14
컴파일 에러
0 ms0 KiB
#include "grader.cpp" #include "factories.h" #include <bits/stdc++.h> #define fi first #define se second #define mp make_pair #define ALL(x) (x).begin(), (x).end() using namespace std; template <typename T1, typename T2> bool mini(T1 &a, T2 b) { if (a > b) {a = b; return true;} return false; } template <typename T1, typename T2> bool maxi(T1 &a, T2 b) { if (a < b) {a = b; return true;} return false; } const int Nmax = 5e5 + 5; const int oo = 1e9; const long long ooo = 1e18; const int mod = 1e9 + 7; // 998244353; const long double pi = 3.14159265359; vector <pair <int, int>> adj[Nmax]; long long d[Nmax]; long long mind[Nmax]; int t[2 * Nmax][20]; int tin[Nmax]; int par[Nmax]; int sz[Nmax]; int h[Nmax]; int timer; bool bk[Nmax]; int getmin(int u, int v) { return (h[u] < h[v]) ? u : v; } void dfs(int u, int p = -1) { t[++timer][0] = u; tin[u] = timer; for (pair <int, int> to : adj[u]) { int v = to.fi; int w = to.se; if (v == p) continue; h[v] = h[u] + 1; d[v] = d[u] + w; dfs(v, u); t[++timer][0] = u; } } void build() { for (int j = 1; j < 20; j++) for (int i = 1; i + (1 << j) - 1 <= timer; i++) t[i][j] = getmin(t[i][j - 1], t[i + (1 << (j - 1))][j - 1]); } long long dis(int u, int v) { int l = tin[u]; int r = tin[v]; if (l > r) swap(l, r); int lg = log2(r - l + 1); int p = getmin(t[l][lg], t[r - (1 << lg) + 1][lg]); // cerr << u << " " << v << " " << p << "\n"; return d[u] + d[v] - (d[p] << 1); } int calc(int u, int p = -1) { sz[u] = 1; for (pair <int, int> to : adj[u]) { int v = to.fi; if (v == p || bk[v]) continue; sz[u] += calc(v, u); } return sz[u]; } int getcen(int u, int S, int p = -1) { for (pair <int, int> to : adj[u]) { int v = to.fi; if (v == p || bk[v] || (sz[v] << 1) <= S) continue; return getcen(v, S, u); } return u; } int centroid(int u) { int r = getcen(u, calc(u)); bk[r] = true; for (pair <int, int> to : adj[r]) { int v = to.fi; if (bk[v]) continue; par[centroid(v)] = r; } return r; } void Init(int n, int a[], int b[], int d[]) { for (int i = 0; i < n - 1; i++) { adj[a[i]].push_back(mp(b[i], d[i])); adj[b[i]].push_back(mp(a[i], d[i])); } dfs(0); build(); par[centroid(0)] = -1; for (int i = 0; i < n; i++) mind[i] = ooo; } void reset(int u) { if (u < 0) return; mind[u] = ooo; reset(par[u]); } void update(int u, int cur) { if (cur < 0) return; // cerr << u << " " << cur << " " << dis(u, cur) << "\n"; mini(mind[cur], dis(u, cur)); update(u, par[cur]); } long long getans(int u, int cur) { if (cur < 0) return ooo; // cerr << u << " " << cur << " " << dis(u, cur) << "\n"; long long res = mind[cur] + dis(u, cur); mini(res, getans(u, par[cur])); return res; } long long Query(int s, int x[], int t, int y[]) { for (int i = 0; i < s; i++) update(x[i], x[i]); long long res = ooo; for (int i = 0; i < t; i++) mini(res, getans(y[i], y[i])); for (int i = 0; i < s; i++) reset(x[i]); return res; }

컴파일 시 표준 에러 (stderr) 메시지

/usr/bin/ld: /tmp/cc7MxmvR.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccvv0eiQ.o:factories.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status