View Compilation Error

0_0_33777120_8589.cpp: In function 'int main()':
0_0_33777120_8589.cpp:22:9: error: 'a' was not declared in this scope
         a.clear();
         ^
0_0_33777120_8589.cpp:23:9: error: 'b' was not declared in this scope
         b.clear();
         ^
0_0_33777120_8589.cpp:38:11: error: 'str' was not declared in this scope
    rr=min(str,a[i].second);
           ^
0_0_33777120_8589.cpp:62:23: error: 're' was not declared in this scope
         printf("%d ", re[i]);
                       ^