Compilare: user.cpp: In function ‘int main()’: user.cpp:91:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = i; j + 1 < Active.size(); j++) ~~~~~~^~~~~~~~~~~~~~~ user.cpp:104:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Active.size() && ok; i++) ~~^~~~~~~~~~~~~~~ user.cpp:86:9: warning: unused variable ‘tmp’ [-Wunused-variable] int tmp = 0; ^~~ user.cpp:57:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d", &n, &m); ^ user.cpp:59:44: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d", &v[i].x, &v[i].y); ^ user.cpp:64:44: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d", &w[i].x, &w[i].y); ^