Submission #62770477

Source Code Expand

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#include <bits/stdc++.h>
using namespace std;
int n, m, ans;
set<pair<int, int>> c;
int main() {
  scanf ("%d%d", &n, &m);
  ans = 0;
  for (int i = 1; i <= m; ++i) {
    int u, v;
    scanf ("%d%d", &u, &v);
    if (u > v) {
      swap (u, v);
    }
    if (c.find (make_pair (u, v)) != c.end ()) {
      ++ans;
    } else {
      if (u == v) {
        ++ans;
      } else {
        c.insert (make_pair (u, v));
      }
 
 
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#include <bits/stdc++.h>
using namespace std;
int n, m, ans;
set<pair<int, int>> c;
int main() {
	scanf ("%d%d", &n, &m);
	ans = 0;
	for (int i = 1; i <= m; ++i) {
		int u, v;
		scanf ("%d%d", &u, &v);
		if (u > v) {
			swap (u, v);
		}
		if (c.find (make_pair (u, v)) != c.end ()) {
			++ans;
		} else {
			if (u == v) {
				++ans;
			} else {
				c.insert (make_pair (u, v));
			}
		}
	}
	printf ("%d\n", ans);
	return 0;
}

Submission Info

Compile Error

Main.cpp: In function ‘int main()’:
Main.cpp:6:15: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
    6 |         scanf ("%d%d", &n, &m);
      |         ~~~~~~^~~~~~~~~~~~~~~~
Main.cpp:10:23: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   10 |                 scanf ("%d%d", &u, &v);
      |                 ~~~~~~^~~~~~~~~~~~~~~~

Judge Result