Compilare: user.cpp: In function ‘void bkt(int, int, int, int)’: user.cpp:31: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp: In function ‘void solve()’: user.cpp:51: warning: suggest parentheses around ‘+’ inside ‘<<’ user.cpp:53: warning: suggest parentheses around ‘+’ inside ‘<<’ user.cpp:76: warning: suggest parentheses around ‘-’ inside ‘<<’ user.cpp:82: warning: suggest parentheses around ‘-’ inside ‘<<’ user.cpp: In function ‘int main()’: user.cpp:93: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:94: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:97: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:102: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result