Compilare: main.cpp: In function 'void dfsbcx(int, int)': main.cpp:19:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < v[nod].size() ; i++){ ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void dfs(int, int)': main.cpp:47:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < g[nod].size() ; i++){ ~~^~~~~~~~~~~~~~~ main.cpp:57:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < g[nod].size() ; i++){ ~~^~~~~~~~~~~~~~~ main.cpp:85:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < s[nod - n].size() && ok ; i++){ ~~^~~~~~~~~~~~~~~~~~~ main.cpp:92:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = i + 1 ; j < s[nod - n].size() && ok ; j++){ ~~^~~~~~~~~~~~~~~~~~~ main.cpp:106:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < g[nod].size() ; i++){ ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void undo(int, int, int)': main.cpp:148:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < g[nod].size() ; i++){ ~~^~~~~~~~~~~~~~~ main.cpp:159:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < s[nod - n].size(); i++){ ~~^~~~~~~~~~~~~~~~~~~ main.cpp:171:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < g[nod].size() ; i++){ ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:215:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0 ; j < idk[i].size() ; j++){ ~~^~~~~~~~~~~~~~~ main.cpp:234:46: warning: format '%d' expects argument of type 'int', but argument 3 has type 'std::set<int>::size_type {aka long unsigned int}' [-Wformat=] fprintf (fout,"%d\n",taken.size()); ^ main.cpp:193:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&n,&m); ^ main.cpp:195:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&c[i]); ^ main.cpp:198:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&x,&y); ^