Compilare: main.cpp: In function 'void bfs(int)': main.cpp:57:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<gcomp[u].size(); i++) ~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:93:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<g[i].size(); j++) ~^~~~~~~~~~~~ main.cpp:107:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<intro.size(); i++) ~^~~~~~~~~~~~~ main.cpp:115:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<intro.size(); i++) ~^~~~~~~~~~~~~ main.cpp:120:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<outro.size(); i++) ~^~~~~~~~~~~~~ main.cpp:127:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<intro.size() && j<outro.size()){ ~^~~~~~~~~~~~~ main.cpp:127:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<intro.size() && j<outro.size()){ ~^~~~~~~~~~~~~ main.cpp:128:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<intro.size() && vizz[intro[i]]==1) ~^~~~~~~~~~~~~ main.cpp:130:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j<outro.size() && vizz[outro[j]]==1) ~^~~~~~~~~~~~~ main.cpp:132:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i<intro.size() && j<outro.size()){ ~^~~~~~~~~~~~~ main.cpp:132:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i<intro.size() && j<outro.size()){ ~^~~~~~~~~~~~~ main.cpp:142:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(; i<intro.size(); i++){ ~^~~~~~~~~~~~~ main.cpp:148:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(; j<outro.size(); j++){ ~^~~~~~~~~~~~~ main.cpp:71:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] { freopen("plan.in", "r", stdin); ^ main.cpp:72:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("plan.out", "w", stdout); ^ main.cpp:74:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^