제출 #991080

#제출 시각아이디문제언어결과실행 시간메모리
991080borisAngelovTraffic (IOI10_traffic)C++17
50 / 100
5053 ms41556 KiB
#include "traffic.h" #include <bits/stdc++.h> using namespace std; const int maxn = 1000005; const long long inf = (1LL << 60); int n; int a[maxn]; vector<int> g[maxn]; long long ans[maxn]; long long subtreeSum[maxn]; long long down[maxn]; void dfs(int node, int par, int dep) { down[node] = 0; subtreeSum[node] = a[node]; for (int i = 0; i < g[node].size(); ++i) { int to = g[node][i]; if (to != par) { dfs(to, node, dep + 1); subtreeSum[node] += subtreeSum[to]; down[node] = max(down[node], subtreeSum[to]); } } } int LocateCentre(int N, int pp[], int S[], int D[]) { n = N; for (int i = 1; i <= n; ++i) { a[i] = pp[i - 1]; } for (int i = 1; i <= n - 1; ++i) { int x = S[i - 1]; int y = D[i - 1]; ++x; ++y; g[x].push_back(y); g[y].push_back(x); } long long ans = inf; int node = -1; for (int i = 1; i <= n; ++i) { dfs(i, -1, 0); if (ans > down[i]) { node = i; ans = down[i]; //cout << node << " :: " << ans << endl; } } return node - 1; }

컴파일 시 표준 에러 (stderr) 메시지

traffic.cpp: In function 'void dfs(int, int, int)':
traffic.cpp:23:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |     for (int i = 0; i < g[node].size(); ++i)
      |                     ~~^~~~~~~~~~~~~~~~
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