Submission #25767

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
25767	2017-06-24 05:36:01	kriii	전압 (JOI14_voltage)	C++14	100 / 100	229 ms	15160 KiB

voltage

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
#include <stdio.h>
#include <vector>
using namespace std;
vector<int> G[100100];
int N,M,X[200200],Y[200200],C[200200];
int D[100100],U[100100];
int gety(int x, int i)
{
  return X[i] == x ? Y[i] : X[i];
}
int bridge, badback, badmx, badmxcnt, badcnt[100100], goodcnt[100100];
void dfs(int x)
{
  U[x] = D[x];
  for (auto &i : G[x]) if (!C[i]){
    C[i] = 1;
    int y = gety(x,i);
    if (D[y] == 0){
      D[y] = D[x] + 1;
      dfs(y);
      badcnt[x] += badcnt[y];
      goodcnt[x] += goodcnt[y];
      if (U[y] == D[y]) bridge++;
      if (U[x] > U[y]) U[x] = U[y];
    }
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Compilation message (stderr)

voltage.cpp: In function 'int main()':
voltage.cpp:84:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i=0;i<bad.size();i++) if (bad[i]) ans += res[i];
                 ^
voltage.cpp:51:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf ("%d %d",&N,&M);
                       ^
voltage.cpp:53:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf ("%d %d",&X[i],&Y[i]);
                              ^

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 35 / 35
• Subtask 4: 45 / 45