Compilare: user.cpp: In function ‘void bkt(int, int, int, int)’: user.cpp:31: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp:39: warning: suggest parentheses around ‘-’ inside ‘<<’ user.cpp:40: warning: suggest parentheses around ‘-’ inside ‘<<’ user.cpp:15: warning: unused variable ‘j’ user.cpp: In function ‘void solve()’: user.cpp:55: warning: suggest parentheses around ‘+’ inside ‘<<’ user.cpp:57: warning: suggest parentheses around ‘+’ inside ‘<<’ user.cpp:80: warning: suggest parentheses around ‘-’ inside ‘<<’ user.cpp:86: warning: suggest parentheses around ‘-’ inside ‘<<’ user.cpp: In function ‘int main()’: user.cpp:98: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:99: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:102: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:107: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result