题解：P14497 [NCPC 2025] Crochet Competition

#include<bits/stdc++.h>
using namespace std;
int d,h,m,ed,eh,em;
int f(string x){
    if(x=="Mon")return 1;
    else if(x=="Tue")return 2;
    else if(x=="Wed")return 3;
    else if(x=="Thu")return 4;
    else if(x=="Fri")return 5;
    else if(x=="Sat")return 6;
    else return 7;
}
int main(){
    string a,b;
    getline(cin,a);
    getline(cin,b);
    string d1=a.substr(0,3);
    string d2=b.substr(0,3);
    h=stoi(a.substr(4,2));
    m=stoi(a.substr(7,2));
    eh=stoi(b.substr(4,2));
    em=stoi(b.substr(7,2));
    d=f(d1);
    ed=f(d2);
    int last=0;
    if(d==ed&&h==eh&&m==em){
        last=7*1440;
    }else{
        while(!(d==ed&&h==eh&&m==em)){
            last++;
            m++;
            if(m==60){
                m=0;
                h++;
            }
            if(h==24){
                h=0;
                d++;
            }
            if(d==8)d=1;
        }
    }
    int ansd=last/1440,ansh=(last%1440)/60,ansm=last%60;
    vector<string>v;
    if(ansd>0){
        if(ansd==1)v.push_back("1 day");
        else v.push_back(to_string(ansd)+" days");
    }
    if(ansh>0){
        if(ansh==1)v.push_back("1 hour");
        else v.push_back(to_string(ansh)+" hours");
    }
    if(ansm>0){
        if(ansm==1)v.push_back("1 minute");
        else v.push_back(to_string(ansm)+" minutes");
    }
    if(v.size()==3){
        cout<<v[0]<<", "<<v[1]<<", "<<v[2];
    }else if(v.size()==2){
        cout<<v[0]<<" and "<<v[1];
    }else{
        cout<<v[0];
    }
    return 0;
}