제출 #170447

#제출 시각아이디문제언어결과실행 시간메모리
170447dolphingarlicTraining (IOI07_training)C++14
컴파일 에러
0 ms0 KiB
#include <bits/stdc++.h> #define FOR(i, x, y) for (int i = x; i < y; i++) using namespace std; struct R { int a, b, c, lca; }; vector<int> t[5001]; vector<R> r; pair<int, int> p[5001]; bool e[5001]; int dp[5001][1 << 10], tm = 0, tin[5001], tout[5001], deg[5001]; bool operator<(R A, R B) { return tout[A.lca] < tout[B.lca]; } void d(int node = 1, int parent = 0) { e[node] = !e[parent]; tin[node] = ++tm; for (int i : t[node]) { if (i != parent) { p[i] = {node, 1 << deg[node]++}; d(i, node); } } tout[node] = ++tm; } bool par(int A, int B) { return tin[A] <= tin[B] && tout[A] >= tout[B]; } int lca(int A, int B) { while (!par(A, B)) A = p[A].first; return A; } int main() { ios_base::sync_with_stdio(0); cin.tie(0); int n, m, cost = 0; cin >> n >> m; FOR(i, 0, m) { int a, b, c; cin >> a >> b >> c; cost += c; if (!c) { t[a].push_back(b); t[b].push_back(a); } r.push_back({a, b, c}); } d(); FOR(i, 0, m) r[i].lca = lca(r[i].a, r[i].b); sort(r.begin(), r.end()); for (R i : r) { if (i.c && e[i.a] ^ e[i.b]) continue; int sm = i.c; pair<int, int> A, B; for (A = {i.a, 0}; A.first != i.lca; A = p[A.first]) sm += dp[A.first][A.second]; for (B = {i.b, 0}; B.first != i.lca; B = p[B.first]) sm += dp[B.first][B.second]; for (int mask = (1 << deg[i.lca]) - 1; ~mask; mask--) { if (!(mask & A.second || mask & B.second)) { dp[i.lca][mask] = max(dp[i.lca][mask], sm + dp[i.lca][mask | A.second | B.second]); } } } cout << cost - dp[1][0]; return 0; }

컴파일 시 표준 에러 (stderr) 메시지

training.cpp: In function 'void d(int, int)':
training.cpp:21:19: error: reference to 'tm' is ambiguous
     tin[node] = ++tm;
                   ^~
training.cpp:13:24: note: candidates are: int tm
 int dp[5001][1 << 10], tm = 0, tin[5001], tout[5001], deg[5001];
                        ^~
In file included from /usr/include/c++/7/ctime:42:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:49,
                 from training.cpp:1:
/usr/include/time.h:133:8: note:                 struct tm
 struct tm
        ^~
training.cpp:28:20: error: reference to 'tm' is ambiguous
     tout[node] = ++tm;
                    ^~
training.cpp:13:24: note: candidates are: int tm
 int dp[5001][1 << 10], tm = 0, tin[5001], tout[5001], deg[5001];
                        ^~
In file included from /usr/include/c++/7/ctime:42:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:49,
                 from training.cpp:1:
/usr/include/time.h:133:8: note:                 struct tm
 struct tm
        ^~