Submission #782805

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
782805	2023-07-14 09:40:42	berr	Race (IOI11_race)	C++17	100 / 100	288 ms	36236 KiB

race

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#include<bits/stdc++.h>
#include "race.h"
using namespace std;
const int N = 2e5+37;
int mi = 1e7, n, k, p;
vector<array<int, 2>> adj[N];
vector<int> s(N), vis2(N);
vector<int> best((int)1e6+37, 1e7); 
vector<array<int, 2>> mp;
vector<int> pff;
void dfs(int v, int p){
    int pf=0;
    s[v] = 1;
    for(auto i: adj[v]){
        if(vis2[i[0]]||i[0]==p) continue;
        pf++;
        dfs(i[0], v); s[v]+=s[i[0]];
    }
}
int dfs2(int v, int p, int gh){
    for(auto i: adj[v]){
        if(vis2[i[0]]||i[0]==p) continue;
        if(s[i[0]]>=gh/2) return dfs2(i[0], v, gh);
    }
    return v;
}
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

race.cpp: In function 'void f()':
race.cpp:107:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  107 |     freopen("in.txt", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
race.cpp:108:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  108 |     freopen("out.txt", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 12 / 12
• Subtask 3: 22 / 22
• Subtask 4: 57 / 57