제출 #432479

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
432479		Nghes	Traffic (IOI10_traffic)	C++14	0 / 100	46 ms	48144 KiB

traffic

#include "traffic.h"
#include <bits/stdc++.h>
using namespace std;
typedef int64_t ll;
#define E '\n'
const int N = 1e6;
int fans;
int f[N+13];
int g[N+13];
int P[N+13];
vector<int> a[N+13];
bool maximize(int &x,int y){
    return x < y ? x =y ,1 : 0;
}
bool minimize(int &x,int y){
    return x > y ? x =y ,1 : 0;
}
int dp(int u,int p){
    int child = 0;
    for (int i=0 ; i < a[u].size(); ++i){
        int v = a[u][i];
        if (v == p) continue;
        child += dp(v,u) + P[v];
        maximize(f[u],f[v] + P[v]);
    }
    g[u] = fans - child;

}
int LocateCentre (int n, int p[], int d[], int s[])
{
    for (int i=0 ; i < n; ++i){
        fans += p[i];
        P[i+1] = p[i];
        a[s[i]+1] . push_back(d[i]+1);
        a[d[i]+1] . push_back(s[i]+1);
    }
    dp(1,1);
    int MIN = 1e9+19;
    int res = 0;
    for (int i=1; i <= n ; ++i)
        if (minimize(MIN,max(g[i],f[i]))) res = i;
    return res;
}

컴파일 시 표준 에러 (stderr) 메시지

traffic.cpp: In function 'int dp(int, int)':
traffic.cpp:20:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |     for (int i=0 ; i < a[u].size(); ++i){
      |                    ~~^~~~~~~~~~~~~
traffic.cpp:28:1: warning: no return statement in function returning non-void [-Wreturn-type]
   28 | }
      | ^

• Subtask 1: 0 / 25
• Subtask 2: 0 / 25
• Subtask 3: 0 / 25
• Subtask 4: 0 / 25