c_cpp CodeChef-事件

Posted 2021-05-14

#include<bits/stdc++.h>
using namespace std;

string conv(int n){
    if(n==0){
        return "0";
    }
    string ans;
    while(n>0){
        ans.insert(ans.begin()+0, (n%10)+'0' );
        n/=10;
    }
    return ans;
}
string solve(string s, string e, int l, int r){
    vector<string> week={"monday", "tuesday", "wednesday",
    "thursday", "friday", "saturday", "sunday"};
    int minDays=0;
    int startNum;
    for(int i=0;i<7;i++){
        if(s==week[i]){
            startNum=i;
            break;
        }
    }
    int i=startNum;
    while(true){
        if(week[i]==e){
            minDays++;
            break;
        }
        minDays++;
        i=(i+1)%7;
    }
    int count=0;
    int unique;
    for(int j=l;j<=r;j++){
        if(count>1){
            break;
        }
        if( j==minDays ){
            unique=j;
            count++;
        }else{
            if( (j-minDays)%7 == 0 ){
                unique=j;
                count++;
            }
        }
    }
    string ans;
    if(count==1){
        ans=conv(unique);
    }else if(count>1){
        ans="many";
    }else{
        ans="impossible";
    }
    return ans;
}

int main(){
    // freopen("ip.txt","r",stdin);
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    int t;
    cin>>t;
    while(t--){
        string s,e;
        int l,r;
        cin>>s>>e>>l>>r;
        cout<<solve(s,e,l,r)<<endl;
    }
    return 0;
}