View Compilation Error

0_0_13976954_23741.cpp: In function 'int main()':
0_0_13976954_23741.cpp:27:8: error: 'i' was not declared in this scope
    for(i=0;i<n;i++)
        ^
0_0_13976954_23741.cpp:32:8: error: 'i' was not declared in this scope
    for(i=0;i<n-1;i++)
        ^
0_0_13976954_23741.cpp:50:9: error: 'i' was not declared in this scope
     for(i=a[j].time;i>0;i--)
         ^
0_0_13976954_23741.cpp:60:8: error: 'i' was not declared in this scope
     if(i==0)
        ^