Compilare: main.cpp: In function 'int32_t main()': main.cpp:104:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < bau.size() ; ++ i) ~~^~~~~~~~~~~~ main.cpp:106:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0 ; j < bau[i].size() - 1 ; ++ j) ~~^~~~~~~~~~~~~~~~~~~ main.cpp:117:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0 ; j < bau[i].size() ; ++ j) ~~^~~~~~~~~~~~~~~ main.cpp:130:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<query.size(); ++i) ~^~~~~~~~~~~~~ main.cpp:79:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cabana.in", "r", stdin) ; ^ main.cpp:80:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cabana.out", "w", stdout) ; ^ main.cpp:81:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n) ; ^ main.cpp:85:40: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &vv[i].x, &vv[i].y) ; ^