Compilare: user.cpp: In function ‘int main()’: user.cpp:40:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < coordH[i].size(); ++j){ ^ user.cpp:27:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^ user.cpp:30:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &mat[i][j]); ^