Compilare: main.cpp: In function 'int verif(int)': main.cpp:111:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0;j<e[i].size();j++){ ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:125:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&n,&c); ^ main.cpp:127:44: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&v[i].x,&v[i].y); ^