Submission #13481

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
13481	2015-02-21 21:32:08	ainta	Race (IOI11_race)	C++98	100 / 100	680 ms	33632 KiB

race

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#include "race.h"
#include<stdio.h>
#include<algorithm>
#include<vector>
using namespace std;
vector<int>E[201000], Len[201000];
int n, LL, Res, D[201000], Dep[201000], C[201000], Q[201000], par[201000];
bool chk[201000];
int BFS(int a){
  int h = 0, t = 0, x, i;
  Q[++t] = a;
  par[t] = D[t] = Dep[t] = 0, C[t] = 1;
  while (h < t){
    x = Q[++h];
    for (i = 0; i < E[x].size(); i++){
      if (!chk[E[x][i]] && Q[par[h]] != E[x][i]){
        Q[++t] = E[x][i];
        par[t] = h, D[t] = D[h] + Len[x][i], Dep[t] = Dep[h] + 1, C[t] = 1;
      }
    }
  }
  for (i = t; i>1; i--)C[par[i]] += C[i];
  return t;
}
int get_mid(int SZ){
  int i, M = SZ + 1, x;
  for (i = 1; i <= SZ; i++){
    if (M > C[i] && C[i] > SZ / 2)M = C[i], x = Q[i];
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

race.cpp: In function 'int BFS(int)':
race.cpp:16:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (i = 0; i < E[x].size(); i++){
               ~~^~~~~~~~~~~~~
race.cpp: In function 'void Do(int)':
race.cpp:41:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (i = 0; i < E[m].size(); i++){
              ~~^~~~~~~~~~~~~
race.cpp:44:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (i = 0; i < E[m].size(); i++){
              ~~^~~~~~~~~~~~~
race.cpp: In function 'int get_mid(int)':
race.cpp:32:9: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
  return x;
         ^
race.cpp: In function 'void Do(int)':
race.cpp:28:21: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
  int i, M = SZ + 1, x;
                     ^

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