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View Compilation Error

0_0_25603318_32325.cpp:2:12: error: '__int64_t' does not name a type
 #define ll __int64_t
            ^
0_0_25603318_32325.cpp:6:1: note: in expansion of macro 'll'
 ll a[N],ans[M],C[N];
 ^
0_0_25603318_32325.cpp:2:12: error: '__int64_t' has not been declared
 #define ll __int64_t
            ^
0_0_25603318_32325.cpp:19:19: note: in expansion of macro 'll'
 void update(int x,ll val){ for(;x<=n;C[x]+=val,x+=lowbit(x));}
                   ^
0_0_25603318_32325.cpp: In function 'void update(int, int)':
0_0_25603318_32325.cpp:19:38: error: 'C' was not declared in this scope
 void update(int x,ll val){ for(;x<=n;C[x]+=val,x+=lowbit(x));}
                                      ^
0_0_25603318_32325.cpp: At global scope:
0_0_25603318_32325.cpp:2:12: error: '__int64_t' does not name a type
 #define ll __int64_t
            ^
0_0_25603318_32325.cpp:20:1: note: in expansion of macro 'll'
 ll getsum(int x){ll ret=0;for(;x>0;ret+=C[x],x-=lowbit(x));return ret;}
 ^
0_0_25603318_32325.cpp: In function 'int main()':
0_0_25603318_32325.cpp:25:43: error: 'a' was not declared in this scope
         for(int i=1;i<=n;i++){scanf("%d",&a[i]);}
                                           ^
0_0_25603318_32325.cpp:33:16: error: 'C' was not declared in this scope
         memset(C,0,sizeof(C));
                ^
0_0_25603318_32325.cpp:34:16: error: 'ans' was not declared in this scope
         memset(ans,0,sizeof(ans));
                ^
0_0_25603318_32325.cpp:37:24: error: 'a' was not declared in this scope
                 if(vis[a[L]]){
                        ^
0_0_25603318_32325.cpp:40:26: error: 'a' was not declared in this scope
                 update(L,a[L]);
                          ^
0_0_25603318_32325.cpp:44:39: error: 'getsum' was not declared in this scope
             ans[q[i].No]=getsum(q[i].r)-getsum(q[i].l-1);
                                       ^


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