Compilare: user.cpp: In function ‘int main()’: user.cpp:38:24: warning: format ‘%s’ expects argument of type ‘char*’, but argument 4 has type ‘char (*)[10000001]’ [-Wformat=] scanf("%d%d%s",&A,&B,&S); ^ user.cpp:35:29: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("jstc.in","r",stdin); ^ user.cpp:36:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("jstc.out","w",stdout); ^ user.cpp:38:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%s",&A,&B,&S); ^ user.cpp: In function ‘int Query()’: user.cpp:15:50: warning: ‘X’ is used uninitialized in this function [-Wuninitialized] int left=0,right=V.size()-1,mid,final=-1,X=(A*X+B)%cnt+1; ^