Compilare: user.cpp: In function ‘void catun()’: user.cpp:68:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0 ; j < muchii[i].size() ; j++) ~~^~~~~~~~~~~~~~~~~~ user.cpp:88:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0 ; i < muchii[x.vf2].size() ; i++) ~~^~~~~~~~~~~~~~~~~~~~~~ user.cpp:37:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d %d\n",&n,&m,&k); ^ user.cpp:46:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d ",&a); ^ user.cpp:55:41: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d %d\n",&a,&b,&c); ^