Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:18:11: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if(it!=tata) ^ main.cpp:12:15: warning: unused variable 'pct' [-Wunused-variable] int num=0,pct=0; ^~~ main.cpp: In function 'int main()': main.cpp:71:33: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<std::vector<int> >::size_type {aka long unsigned int}' [-Wformat=] printf("%d\n",rez.size()); ^ main.cpp:72:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<rez.size(); i++) ~^~~~~~~~~~~ main.cpp:75:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<rez[i].size(); j++) ~^~~~~~~~~~~~~~ main.cpp:83:33: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<int>::size_type {aka long unsigned int}' [-Wformat=] printf("%d\n",art.size()); ^ main.cpp:88:32: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<std::pair<int, int> >::size_type {aka long unsigned int}' [-Wformat=] printf("%d\n",critic.size()); ^ main.cpp:56:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("biconex.in","r",stdin); ^ main.cpp:57:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("biconex.out","w",stdout); ^ main.cpp:60:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ main.cpp:63:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^