View Compilation Error

0_0_16229298_29579.cpp:6:1: error: 'pair' does not name a type
 pair <int, int> q[1005];
 ^
0_0_16229298_29579.cpp: In function 'int main()':
0_0_16229298_29579.cpp:31:40: error: 'y' was not declared in this scope
                     a[++r] = j; b[r] = y;
                                        ^