View Compilation Error

0_0_33595972_9314.cpp: In function 'int sol(int, int)':
0_0_33595972_9314.cpp:10:42: error: 'mod' was not declared in this scope
         dp[i+1][j]=(dp[i+1][j]+dp[i][j])%mod;
                                          ^
0_0_33595972_9314.cpp:11:9: error: 'cur' was not declared in this scope
         cur=i;
         ^