Submission #111836

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Source Code Expand

#include <cstdio>
#include <vector>
#include <algorithm>
using namespace std;

int s(int v, vector< vector<bool> > &e, vector<bool> &visit)
{
if(visit[v])
return 0;
int ret = 1;
visit[v] = true;
for(int i = 0; i < e[v].size(); ++i) {
int w = e[v][i];
if(visit[w] || !e[v][w])
continue;
ret += s(w, e, visit);
}
return ret;
}

int main()
{
int n, m;
vector<vector<bool> > e;

scanf("%d%d", &n, &m);
e.resize(n, vector<bool>(n));
for(int i = 0; i < m; ++i) {
int x, y;
scanf("%d%d", &x, &y);
e[x - 1][y - 1] = e[y - 1][x - 1] = true;
}
vector<bool> visit(n);
int ans = 0;
for(int i = 0; i < n; ++i)
ans = max(ans, s(i, e, visit));
printf("%d\n", ans);
return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:26:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
./Main.cpp:30:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]

Judge Result