0_0_31710000_14611.cpp: In function 'int main()': 0_0_31710000_14611.cpp:30:25: error: 'x' was not declared in this scope int len = e[x][y]; ^ 0_0_31710000_14611.cpp:30:28: error: 'y' was not declared in this scope int len = e[x][y]; ^