View Compilation Error

0_0_34616619_29344.cpp: In function 'void solve()':
0_0_34616619_29344.cpp:41:8: error: redeclaration of 'int cow'
    int cow = min(pre, i, cmp);
        ^
0_0_34616619_29344.cpp:27:8: note: 'int cow' previously declared here
    int cow=i;
        ^