Submission #20250

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
20250	2016-08-09 02:01:37	hongjun7	Cactus? Not cactus? (kriii1_C)	C++14	1 / 1	115 ms	27 KiB

C

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#include <stdio.h>
#include <vector>
#include <algorithm>
using namespace std;
#define MAXN 100005
int n, m, d[MAXN], res, up[MAXN];
vector <int> v[MAXN];
int f(int x, int par) {
  int cnt = 0, ret = d[x];
  up[x] = d[x];
  for (auto &y : v[x]) {
    if (y == par) continue;
    if (!d[y]) {
      d[y] = d[x] + 1;
      int u = f(y, x);
      ret = min(ret, u);
      if (u <= d[x]) cnt++;
    }
    else {
      if (d[y] < d[x]) cnt++;
      up[x] = min(up[x], d[y]);
    }
  }
  if (cnt >= 2) res = 0;
  ret = min(ret, up[x]);
  return ret;
}
int main() {
  scanf("%d%d", &n, &m);
  for (int i = 1; i <= m; i++) {
 
 
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Compilation message (stderr)

C.cpp: In function 'int main()':
C.cpp:29:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &n, &m);
                       ^
C.cpp:31:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   int x, y; scanf("%d%d", &x, &y);
                                  ^

• Subtask 1: 1 / 1