Compilare: user.cpp: In function ‘int bs(int, int, int)’: user.cpp:24:24: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if (i + p <= n && v[k][i + p].x < x || (v[k][i + p].x == x && v[k][i + p].y <= y)) ^ user.cpp:28:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘void solve()’: user.cpp:78:10: warning: variable ‘ok’ set but not used [-Wunused-but-set-variable] bool ok = 1; ^ user.cpp: In function ‘void read()’: user.cpp:31:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("overlap.in", "r", stdin); ^ user.cpp:32:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:34:47: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &v[0][i].x, &v[0][i].y); ^ user.cpp: In function ‘void write()’: user.cpp:100:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("overlap.out", "w", stdout); ^