View Compilation Error

0_0_33595962_18787.cpp: In function 'int sol(int, int)':
0_0_33595962_18787.cpp:5:27: error: 'dp' was not declared in this scope
     for(int j=0;j<=m;j++) dp[i][j]=0;
                           ^
0_0_33595962_18787.cpp:6:5: error: 'dp' was not declared in this scope
     dp[1][0]=1;
     ^
0_0_33595962_18787.cpp:9:42: error: 'mod' was not declared in this scope
         dp[i+1][j]=(dp[i+1][j]+dp[i][j])%mod;
                                          ^
0_0_33595962_18787.cpp:10:9: error: 'cur' was not declared in this scope
         cur=i;
         ^