Compilare: main.cpp: In function 'int main()': main.cpp:30:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v1.size();i++) ~^~~~~~~~~~ main.cpp:54:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v2.size();i++) ~^~~~~~~~~~ main.cpp:15:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d%d",&n,&m,&t); ^ main.cpp:18:39: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d%d",&xx,&yy,&z); ^