Compilare: main.cpp: In function 'int main()': main.cpp:205:9: warning: unused variable 'target_point_cnt' [-Wunused-variable] int target_point_cnt = n / 3; ^~~~~~~~~~~~~~~~ main.cpp:157:61: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&vertex[i].first,&vertex[i].second); ^ main.cpp:160:22: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ main.cpp:163:59: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&point[i].first,&point[i].second); ^