sirni.cpp: In function 'int main()':
sirni.cpp:80:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
80 | bool usaco=0;if(usaco){freopen(".in","r",stdin);freopen(".out","w",stdout);}
| ~~~~~~~^~~~~~~~~~~~~~~~~
sirni.cpp:80:60: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
80 | bool usaco=0;if(usaco){freopen(".in","r",stdin);freopen(".out","w",stdout);}
| ~~~~~~~^~~~~~~~~~~~~~~~~~~