Compilare: main.cpp: In function 'int main()': main.cpp:40:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<nod[0][0].size();i++){ ~^~~~~~~~~~~~~~~~~ main.cpp:55:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<nod[nd][0].size();i++){ ~^~~~~~~~~~~~~~~~~~ main.cpp:24:28: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d",&n,&m); ^ main.cpp:27:37: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d%d",&a,&b,&c); ^