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D题解

这题对题目给出的所有条件进行特判即可

直接贴代码

#include <bits/stdc++.h>

using namespace std;

string s;

int main()
{
    cin>>s;
    int l = s.length();
    string cnt1="0", cnt2="0"; 
    int flag1 = -1, flag2 = -1;
    for(int i=0; i<l; ++i){
        if(s[i]=='A'){
            if(cnt1 == "0") cnt1 = "15";
            else if(cnt1 == "15") cnt1 = "30";
            else if(cnt1 == "30") cnt1 = "40";
            else if(cnt1 == "40" && cnt2!="40" && cnt2!="AD"){
                flag1 = i;
                break;
            }
            else if(cnt1 == "40" && cnt2=="40") cnt1 = "AD";
            else if(cnt1 == "40" && cnt2=="AD") cnt2 = "40";
            else if(cnt1 == "AD"){
                flag1 = i;
                break;
            }
        }else{
            if(cnt2 == "0") cnt2 = "15";
            else if(cnt2 == "15") cnt2 = "30";
            else if(cnt2 == "30") cnt2 = "40";
            else if(cnt2 == "40" && cnt1!="40" && cnt1!="AD"){
                flag2 = i;
                break;
            }
            else if(cnt2 == "40" && cnt1=="40") cnt2 = "AD";
            else if(cnt2 == "40" && cnt1=="AD") cnt1 = "40";
            else if(cnt2 == "AD"){
                flag2 = i;
                break;
            }
        }
    }
    if(flag1 == l-1) cout<<"A won"<<endl;
    else if(flag2 == l-1) cout<<"B won"<<endl;
    else if(flag1 != -1 || flag2!=-1) cout<<"INVALID"<<endl;
    else cout<<cnt1<<":"<<cnt2<<endl;
    return 0;
}