0_0_17030709_15723.cpp: In function 'int main()':
0_0_17030709_15723.cpp:6:25: error: 'scanf' was not declared in this scope
int T; scanf("%d",&T);
^
0_0_17030709_15723.cpp:16:44: error: 'printf' was not declared in this scope
printf("44444444447777777777\n");
^
0_0_17030709_15723.cpp:21:53: error: 'printf' was not declared in this scope
for(int i=1;i<=(len+1)/2;i++) printf("4");
^
0_0_17030709_15723.cpp:22:53: error: 'printf' was not declared in this scope
for(int i=1;i<=(len+1)/2;i++) printf("7");
^
0_0_17030709_15723.cpp:23:24: error: 'printf' was not declared in this scope
printf("\n");
^
0_0_17030709_15723.cpp:34:55: error: 'printf' was not declared in this scope
for(int i=1;i<=len/2+1;i++) printf("4");
^
0_0_17030709_15723.cpp:35:55: error: 'printf' was not declared in this scope
for(int i=1;i<=len/2+1;i++) printf("7");
^
0_0_17030709_15723.cpp:36:28: error: 'printf' was not declared in this scope
printf("\n");
^
0_0_17030709_15723.cpp:90:58: error: 'printf' was not declared in this scope
for(int k=0;k<u;k++) printf("%lld",ans[k]);
^
0_0_17030709_15723.cpp:91:49: error: 'printf' was not declared in this scope
for(int k=0;k<ss;k++) printf("4");
^
0_0_17030709_15723.cpp:92:49: error: 'printf' was not declared in this scope
for(int k=0;k<sq;k++) printf("7");
^
0_0_17030709_15723.cpp:93:28: error: 'printf' was not declared in this scope
printf("\n");
^
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