#include<iostream> #include<cmath> #include<cstring> #include<algorithm> using namespace std; int main(){ long long t; while(scanf("%lld",&t)!=EOF){ long long i=1; for(int j=1;j<t;j++) i+=5; long long sum=(long long)i*21+2; printf("%lld\n",sum); } return 0; } |
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