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:56:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (cc=0; cc<sol.size(); ++cc) ^ user.cpp:57:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<g[sol[cc]].size(); ++i) ^ 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); ^