bank.cpp: In function 'void solve()':
bank.cpp:34:14: warning: unused variable 'mx' [-Wunused-variable]
34 | ll i,j,b,mx=-1,l,r,k,ans=1,lst;
| ^~
bank.cpp:34:20: warning: unused variable 'l' [-Wunused-variable]
34 | ll i,j,b,mx=-1,l,r,k,ans=1,lst;
| ^
bank.cpp:34:22: warning: unused variable 'r' [-Wunused-variable]
34 | ll i,j,b,mx=-1,l,r,k,ans=1,lst;
| ^
bank.cpp:34:24: warning: unused variable 'k' [-Wunused-variable]
34 | ll i,j,b,mx=-1,l,r,k,ans=1,lst;
| ^
bank.cpp:34:26: warning: unused variable 'ans' [-Wunused-variable]
34 | ll i,j,b,mx=-1,l,r,k,ans=1,lst;
| ^~~
bank.cpp:34:32: warning: unused variable 'lst' [-Wunused-variable]
34 | ll i,j,b,mx=-1,l,r,k,ans=1,lst;
| ^~~
bank.cpp: In function 'void fre(std::string)':
bank.cpp:12:27: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
12 | void fre(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:12:64: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
12 | void fre(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp: In function 'bool check(long long int, long long int)':
bank.cpp:32:1: warning: control reaches end of non-void function [-Wreturn-type]
32 | }
| ^