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View Compilation Error

0_0_21488376_18219.cpp:10:1: error: expected initializer before 'll'
 ll a[2*maxn],b[2*maxn],wn[26];
 ^
0_0_21488376_18219.cpp: In function 'void GetWn()':
0_0_21488376_18219.cpp:32:9: error: 'wn' was not declared in this scope
         wn[i]=quick_mod(G,(P-1)/t);
         ^
0_0_21488376_18219.cpp: In function 'void NTT(ll*, int, int)':
0_0_21488376_18219.cpp:67:25: error: 'wn' was not declared in this scope
                 w=mul(w,wn[id]);
                         ^
0_0_21488376_18219.cpp: In function 'int main()':
0_0_21488376_18219.cpp:107:26: error: 'c' was not declared in this scope
             scanf("%lld",c+i);
                          ^
0_0_21488376_18219.cpp:123:13: error: 'a' was not declared in this scope
             a[i]=res*facinv[i]%mod;
             ^
0_0_21488376_18219.cpp:125:13: error: 'b' was not declared in this scope
             b[i]=c[n-i]*fac[n-i]%mod;
             ^
0_0_21488376_18219.cpp:125:18: error: 'c' was not declared in this scope
             b[i]=c[n-i]*fac[n-i]%mod;
                  ^
0_0_21488376_18219.cpp:129:13: error: 'a' was not declared in this scope
             a[i]=b[i]=0;
             ^
0_0_21488376_18219.cpp:129:18: error: 'b' was not declared in this scope
             a[i]=b[i]=0;
                  ^
0_0_21488376_18219.cpp:130:14: error: 'a' was not declared in this scope
         Conv(a,b,len);
              ^
0_0_21488376_18219.cpp:130:16: error: 'b' was not declared in this scope
         Conv(a,b,len);
                ^


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