/in/foo.cc: In function 'Matrix Cheng(Matrix, Matrix)':
/in/foo.cc:127:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(i=1;i<=9;i++)
  ^~~
/in/foo.cc:132:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
   return c;
   ^~~~~~
/in/foo.cc: In function 'void Cheng1(int (*)[4], int (*)[4])':
/in/foo.cc:148:3: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   for(j=1;j<=3;j++)
   ^~~
/in/foo.cc:151:4: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
    for(i=1;i<=3;i++)
    ^~~
/in/foo.cc: In function 'void KSM1(int)':
/in/foo.cc:180:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(i=1;i<=3;i++)
  ^~~
/in/foo.cc:184:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
   for(i=0;(1ll<<i)<=x;i++)
   ^~~
/in/foo.cc: In function 'void CAL(int, int, int)':
/in/foo.cc:189:6: warning: unused variable 'i' [-Wunused-variable]
  int i,j;
      ^
/in/foo.cc:189:8: warning: unused variable 'j' [-Wunused-variable]
  int i,j;
        ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:436:19: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   while(c=getchar())
                   ^
/in/foo.cc:436:3: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
   while(c=getchar())
   ^~~~~
/in/foo.cc:438:4: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'while'
    if(c=='q'){scanf("uery");l=Get_Int();r=Get_Int();
    ^~