Compilare: user.cpp: In function ‘int main()’: user.cpp:106:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = i; j + 1 < Active.size(); j++) ~~~~~~^~~~~~~~~~~~~~~ user.cpp:101:9: warning: unused variable ‘tmp’ [-Wunused-variable] int tmp = 0; ^~~ user.cpp:72:30: 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:74:44: 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:79:44: 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); ^