Compilare: main.cpp: In function 'void dfs_ctc(int)': main.cpp:17:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[nod].size();i++){ ~^~~~~~~~~~~~~~ main.cpp: In function 'void precalc(int)': main.cpp:41:20: 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)': main.cpp:53:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < v[nod].size() ; i++){ ~~^~~~~~~~~~~~~~~ main.cpp:75:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < v[nod].size() ; i++){ ~~^~~~~~~~~~~~~~~ main.cpp:107:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < v[nod].size() ; i++){ ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:170:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0 ; j < sl[i].size() ; j++){ ~~^~~~~~~~~~~~~~ main.cpp:173:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (k = 0 ; k < v[nod].size() ; k++){ ~~^~~~~~~~~~~~~~~ main.cpp:143:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&n); ^ main.cpp:146:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&x); ^