View Compilation Error

0_0_6623968_12711.cpp: In function `int main()':
0_0_6623968_12711.cpp:29: error: no match for 'operator=' in 'prel[0][0] = 0'
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/bits/stl_pair.h:69: note: candidates are: std::pair<int, int>& std::pair<int, int>::operator=(const std::pair<int, int>&)
0_0_6623968_12711.cpp:46: error: no match for 'operator=' in 'prer[(n + 1)][0] = 0'
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/bits/stl_pair.h:69: note: candidates are: std::pair<int, int>& std::pair<int, int>::operator=(const std::pair<int, int>&)