View Compilation Error

0_0_17076080_20165.cpp:5:7: error: 'N' was not declared in this scope
 int c[N][N];
       ^
0_0_17076080_20165.cpp:5:10: error: 'N' was not declared in this scope
 int c[N][N];
          ^
0_0_17076080_20165.cpp: In function 'int dp(char*, char*)':
0_0_17076080_20165.cpp:11:3: error: 'c' was not declared in this scope
   c[i][0] = i * cost[2];
   ^
0_0_17076080_20165.cpp:13:3: error: 'c' was not declared in this scope
   c[0][j] = j * cost[3];
   ^
0_0_17076080_20165.cpp:16:4: error: 'c' was not declared in this scope
    c[i + 1][j + 1] = inf;
    ^
0_0_17076080_20165.cpp:46:12: error: 'c' was not declared in this scope
  int ret = c[lx][ly];
            ^