Codeforces Round #432 (Div. 2, based on IndiaHacks Final Round 2017) A

In the following a sitting spectator is represented as -, a standing spectator is represented as ^.

• At t = 0  ----------  number of standing spectators = 0.
• At t = 1  ^---------  number of standing spectators = 1.
• At t = 2  ^^--------  number of standing spectators = 2.
• At t = 3  ^^^-------  number of standing spectators = 3.
• At t = 4  ^^^^------  number of standing spectators = 4.
• At t = 5  ^^^^^-----  number of standing spectators = 5.
• At t = 6  -^^^^^----  number of standing spectators = 5.
• At t = 7  --^^^^^---  number of standing spectators = 5.
• At t = 8  ---^^^^^--  number of standing spectators = 5.
• At t = 9  ----^^^^^-  number of standing spectators = 5.
• At t = 10 -----^^^^^  number of standing spectators = 5.
• At t = 11 ------^^^^  number of standing spectators = 4.
• At t = 12 -------^^^  number of standing spectators = 3.
• At t = 13 --------^^  number of standing spectators = 2.
• At t = 14 ---------^  number of standing spectators = 1.
• At t = 15 ----------  number of standing spectators = 0.

题意：自己读一读就行

解法：暗中观察

 1 #include<bits/stdc++.h>
 2 using namespace std;
 3 int main(){
 4     int n,k,t;
 5     cin>>n>>k>>t;
 6     if(k>=t){
 7         cout<<t<<endl;
 8     }else if(t<=n){
 9         cout<<k<<endl;
10     }else if(n+k<=t){
11         cout<<"0"<<endl;
12     }else{
13         cout<<k-(t-n)<<endl;
14     }
15     return 0;
16 }