Compilare: main.cpp: In function 'void bkt(int, int)': main.cpp:51:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<g[nod].size(); i++){ ~^~~~~~~~~~~~~~ main.cpp:36:10: warning: unused variable 'ok' [-Wunused-variable] int i, ok; ^~ main.cpp: In function 'int main()': main.cpp:66:24: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^ main.cpp:69:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &v[i][j]); ^