pikachu.cpp:37: warning: integer constant is too large for 'long' type pikachu.cpp: In function 'int main()': pikachu.cpp:26: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result pikachu.cpp:27: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result pikachu.cpp:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result pikachu.cpp:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result pikachu.cpp:30: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result /tmp/ccVHwiAf.o: In function `main': pikachu.cpp:(.text+0xe6): warning: the `gets' function is dangerous and should not be used.