View Compilation Error

0_0_21163136_1699.cpp: In function 'int main()':
0_0_21163136_1699.cpp:29:13: error: 'll' was not declared in this scope
             ll a,b;
             ^
0_0_21163136_1699.cpp:30:31: error: 'a' was not declared in this scope
             scanf("%lld%lld",&a,&b);//输入区间
                               ^
0_0_21163136_1699.cpp:30:34: error: 'b' was not declared in this scope
             scanf("%lld%lld",&a,&b);//输入区间
                                  ^
0_0_21163136_1699.cpp:31:16: error: expected ';' before 'tp'
             ll tp=re[a-1];
                ^
0_0_21163136_1699.cpp:32:37: error: 'tp' was not declared in this scope
             printf("%lld\n",(sum[b]*tp)%mod);
                                     ^