Compilare: user.cpp: In function ‘int main()’: user.cpp:39:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i < v[nc].size(); i++ ) { ~~^~~~~~~~~~~~~~ user.cpp:16:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d%d", &n, &m, &x ); ^ user.cpp:19:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d", &a, &b ); ^ user.cpp:25:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &p ); ^