Submission #1370755

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Source Code Expand

#include <bits/stdc++.h>  

using namespace std;

#define FOR(i, j, k) for(int i = j; i < k; ++i)
#define rep(i, j) FOR(i, 0, j)
#define FORr(i, j, k) for(int i = j; i >= k; --i)
#define repr(i, j) FOR(i, j, 0)
#define INF (1 << 30)
const int MOD = 1e9 + 7;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> P;
typedef pair<P, int> Pi;

int f[12][12], N, M, res;

void dfs(vector<int> a, int k) {
	if(k == N) {
		rep(i, a.size()) FOR(j, i + 1, a.size()) {
			if(!f[a[i]][a[j]]) return;
		}
		res = max(res, (int)a.size());
	}
	else {
		dfs(a, k + 1);
		a.push_back(k);
		dfs(a, k + 1);
		a.pop_back();
	}
}

int main() {
	scanf("%d %d", &N, &M);
	vector<int> v; 
	rep(i, M) {
		int a, b;
		scanf("%d %d", &a, &b);
		--a; --b;
		f[a][b] = f[b][a] = 1;
	}
	dfs(v, 0);
	printf("%d\n", res);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:35:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &N, &M);
                        ^
./Main.cpp:39:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d", &a, &b);
                         ^

Judge Result