Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:14:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<g[i].size(); ++j)if(!viz[g[i][j]])dfs(g[i][j], d+1); ^ user.cpp: In function ‘int dfsx(int)’: user.cpp:20:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<g[i].size(); ++j)if(!viz[g[i][j]])s[i]+=dfsx(g[i][j]); ^ user.cpp: In function ‘int main()’: user.cpp:28:25: warning: spurious trailing ‘%’ in format [-Wformat=] scanf("%d%d%", &n,&k); ^ user.cpp:50:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1; i<g[r].size(); ++i)if(s[g[r][i]]>j){j=s[g[r][i]]; c2=g[r][i];} ^ user.cpp:57:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1; i<g[c1].size(); ++i)if(s[g[c1][i]]>j){j=s[g[c1][i]]; cap=g[c1][i]; cc=c1;} ^ user.cpp:58:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1; i<g[c2].size(); ++i)if(s[g[c2][i]]>j){j=s[g[c2][i]]; cap=g[c2][i]; cc=c2;} ^ user.cpp:26:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cezar.in", "r", stdin); ^ user.cpp:27:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cezar.out", "w", stdout); ^ user.cpp:28:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%", &n,&k); ^ user.cpp:33:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &j, &l); ^ user.cpp:61:14: warning: ‘cap’ may be used uninitialized in this function [-Wmaybe-uninitialized] s[cap]=-1; ^ user.cpp:62:9: warning: ‘cc’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(cc==c1)c1=cap; ^