sarpe.cpp: In function 'void fill1(int, int)': sarpe.cpp:25: warning: suggest parentheses around comparison in operand of '&' sarpe.cpp: In function 'bool check(int, int)': sarpe.cpp:49: warning: unused variable 'ok' sarpe.cpp: In function 'int main()': sarpe.cpp:84: warning: comparison between signed and unsigned integer expressions sarpe.cpp:75: warning: unused variable 'x' sarpe.cpp:73: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result sarpe.cpp:74: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result sarpe.cpp:76: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result sarpe.cpp:79: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result