View Compilation Error

0_0_16209132_24035.cpp: In function 'int main()':
0_0_16209132_24035.cpp:8:2: error: 'i' was not declared in this scope
  i nt N,i,k;
  ^
0_0_16209132_24035.cpp:9:25: error: 'N' was not declared in this scope
  while(scanf("%d%d",&P,&N) != EOF)
                         ^
0_0_16209132_24035.cpp:21:9: error: 'j' was not declared in this scope
    for( j = w[i]; j <= P; j++)
         ^