Codeforces Round #412 A. Is it rated?
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题意
按排名从高到低给出一次 Codeforces Round 参加者的原 rating (
已知:
- rated Round 至少有一个参加者的 rating 发生了改变 (
bi−ai≠0 ) - 如果这是 rated Round 且存在
ai<aj (i<j) ,则至少有一个参加的 rating 发生了改变
解题思路
根据上述条件判断 Round 是否 rated。
- 若存在
bi≠ai ,则一定是 rated - 若存在
ai<aj (i<j) 且 所有ai=bi ,则一定为 unrated - 其余都为 maybe。
代码
#include<bits/stdc++.h>using namespace std;int n, a[1010], b[1010];string solve(){ scanf("%d",&n); bool flg = 0; for(int i=1;i<=n;i++) { scanf("%d %d",&a[i],&b[i]); if(a[i] != b[i]) return "rated"; if(i>1 && a[i] > a[i-1]) flg = 1; } if(flg) return "unrated"; return "maybe";}int main(){ printf("%s\n", solve().c_str());}
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