CF 851A Arpa and a research in Mexican wave
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Discription
有n个观众,第一时刻第一个观众站起来,第二时刻第二个观众站起来….第k时刻第k个观众站起来,第k+1时刻第k+1个观众站起来并且第一个观众坐下……第n+1时刻,第n+1-k个观众坐下,直到d+k时刻,第n个观众坐下,求第t时刻站着。
Input
n, k, t (1 ≤ n ≤ 109, 1 ≤ k ≤ n, 1 ≤ t < n + k).
Output
t时刻站着的人
Examples
input
10 5 3
output
3
input
10 5 7
output
5
input
10 5 12
output
3
#include <iostream>#include <cstdio>#include <algorithm>#include <vector>#include <cstring>#include <string>using namespace std;int n, k, t;int main(){ // freopen("in.txt", "r", stdin); while (~scanf("%d%d%d", &n, &k, &t)) { int ans = 0; if (t <= k) ans = t; else if (t > k && t <= n) ans = k; else ans = k - (t - n); printf("%d\n", ans); } return 0;}
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