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View Compilation Error

0_0_16265232_20053.cpp: In function 'int main()':
0_0_16265232_20053.cpp:2:5: error: 'll' was not declared in this scope
     ll n, cnt, a, b;
     ^
0_0_16265232_20053.cpp:4:18: error: 'scanf' was not declared in this scope
     scanf("%d",&t);
                  ^
0_0_16265232_20053.cpp:6:25: error: 'n' was not declared in this scope
         scanf("%I64d", &n);
                         ^
0_0_16265232_20053.cpp:7:36: error: 'printf' was not declared in this scope
         if(n==1||n==2) printf("1\n");
                                    ^
0_0_16265232_20053.cpp:8:41: error: 'printf' was not declared in this scope
         else if(n>=3&&n<=6) printf("3\n");
                                         ^
0_0_16265232_20053.cpp:10:14: error: 'cnt' was not declared in this scope
              cnt = 2; a = 5; b = 3;
              ^
0_0_16265232_20053.cpp:10:23: error: 'a' was not declared in this scope
              cnt = 2; a = 5; b = 3;
                       ^
0_0_16265232_20053.cpp:10:30: error: 'b' was not declared in this scope
              cnt = 2; a = 5; b = 3;
                              ^
0_0_16265232_20053.cpp:18:33: error: 'printf' was not declared in this scope
            printf("%I64d\n", cnt);
                                 ^


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