Compilare: user.cpp: In function ‘void left(int, int, int, int)’: user.cpp:15:19: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] while (L <= R && xi > d[p][L].y || yi < d[p][L].x) ^ user.cpp: In function ‘void read()’: user.cpp:33:9: warning: unused variable ‘x’ [-Wunused-variable] int x, y; ^ user.cpp:33:12: warning: unused variable ‘y’ [-Wunused-variable] int x, y; ^ user.cpp:34:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("diagonala.in", "r", stdin); ^ user.cpp:35:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:39:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &xi, &yi); ^ user.cpp: In function ‘void write()’: user.cpp:49:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] printf("%d", sol); ^