0_0_26190015_24335.cpp: In function 'int main()':
0_0_26190015_24335.cpp:4:24: error: 'scanf' was not declared in this scope
while(scanf("%d",&n) != -1)
^
0_0_26190015_24335.cpp:11:24: error: 'printf' was not declared in this scope
printf("%d",sum);
^
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