View Compilation Error

0_0_29989162_18061.cpp:6:18: error: 'o' was not declared in this scope
 multiset<int> ss[o][15];
                  ^
0_0_29989162_18061.cpp: In function 'int main()':
0_0_29989162_18061.cpp:25:26: error: 'ss' was not declared in this scope
                 auto j = ss[o].end();
                          ^
0_0_29989162_18061.cpp:34:13: error: 'ss' was not declared in this scope
             ss[o].insert(a[i]);
             ^