0_0_29447560_21340.cpp: In function 'int main()':
0_0_29447560_21340.cpp:5:15: error: 'scanf' was not declared in this scope
scanf("%d",&n);
^
0_0_29447560_21340.cpp:12:17: error: 'printf' was not declared in this scope
printf("-1\n");
^
0_0_29447560_21340.cpp:27:21: error: 'printf' was not declared in this scope
printf("%d\n",days);
^
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