Codeforces Round #433 (Div. 2, based on Olympiad of Metropolises) ABC

退役老年人的血崩CF。。。c++ A 水題less #include<bits/stdc++.h> using namespace std; int n; int main() { scanf("%d",&n); int x=n/2; while(1) { if(__gcd(x,n-x)==1) break;

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