Codeforces 383 A. Milking cows
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#include <iostream>#include <cstdio>#include <cstring>#include <algorithm>using namespace std;int main(){ long long int n,ans=0,res=0; scanf("%I64d",&n); for(int i=0;i<n;i++) { long long int a; scanf("%I64d",&a); if(a) res++; else ans+=res; } printf("%I64d\n",ans); return 0;}
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- Codeforces 383 A. Milking cows
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- Codeforces 383 A. Milking cows(贪心)
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