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제출 #199621

#제출 시각아이디문제언어결과실행 시간메모리
199621Markomafko972Traffic (IOI10_traffic)C++14
100 / 100
1599 ms151032 KiB
#include <bits/stdc++.h> using namespace std; vector<int> v[1000002]; int a[1000002]; long long sol[1000002]; long long maxi[1000002]; void dfs(int x, int prt) { for (int i = 0; i < v[x].size(); i++) { int sus = v[x][i]; if (sus != prt) { dfs(sus, x); sol[x] += sol[sus]; sol[x] += a[sus]; maxi[x] = max(maxi[x], sol[sus]+a[sus]); } } } int LocateCentre(int n, int p[], int s[], int d[]) { long long zbr = 0; for (int i = 0; i < n; i++) a[i] = p[i], zbr += a[i]; for (int i = 0; i < n-1; i ++) { v[s[i]].push_back(d[i]); v[d[i]].push_back(s[i]); } dfs(1, 0); long long mini = 1e18; int w = 0; for (int i = 0; i < n; i++) { maxi[i] = max(maxi[i], zbr-sol[i]-a[i]); if (maxi[i] < mini) { mini = maxi[i]; w = i; } } return w; }

컴파일 시 표준 에러 (stderr) 메시지

traffic.cpp: In function 'void dfs(int, int)':
traffic.cpp:10:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < v[x].size(); i++) {
                  ~~^~~~~~~~~~~~~
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