Submission #133380

#	Time	Username	Problem	Language	Result	Execution time	Memory
133380		forelax	Cezar (COCI16_cezar)	C++14	10 / 100	4 ms	496 KiB

cezar

#include<bits/stdc++.h>
using namespace std;
bool pref(string a,string b){
    int sm=min(a.length(),b.length());
    string acut=a.substr(0,sm);
    string bcut=b.substr(0,sm);
    if(acut==bcut&&a.length()<b.length())return true;
    return false;
}
vector<vector<int> > ng(26);
bool good=true;
vector<int> visited(26);
vector<int> visiting(26);
vector<int> ord;
void dfs(int a){
    if(visiting[a]){
        good=false;
        return;
    }
    visiting[a]=true;
    for(int i = 0 ; i < ng[a].size() ; i ++){
        int b=ng[a][i];
        if(visited[b])continue;
        dfs(b);
        if(!good)return;
    }
    ord.push_back(a);
    visited[a]=true;
}
int main(){
    int n;
    cin>>n;
    vector<string> a(n),b(n);
    for(int i = 0 ; i < n ; i ++)
        cin>>a[i];
    for(int i = 0 , j; i < n ; i ++){
        cin>>j;j--;
        b[i]=a[j];
    }
    for(int i = 0 ; i < n ; i ++){
        for(int j = 0 ; j < i ; j ++){
            if(pref(b[i],b[j])){
                cout<<"NE";
                return 0;
            }
        }
    }
    for(int i = 0 ; i < n-1 ; i ++){
        int j = i+1;
        if(pref(b[i],b[j]))continue;
        for(int k = 0 ; true ; k ++){
            if(b[i][k]!=b[j][k]){
                ng[b[i][k]-'a'].push_back(b[j][k]-'a');
                break;
            }
        }
    }
    for(int i = 0 ; i < 26 ; i ++){
        if(visited[i])continue;
        dfs(i);
        if(!good){
            cout<<"NE";
            return 0;
        }
    }
    vector<char> rez(26);
    for(int i = 0 ; i <ord.size() ; i ++){
        rez[ord[i]]=char('z'-i);
    }
    cout<<"DA"<<endl;
    for(int i = 0 ; i < 26 ; i ++)cout<<rez[i];
}

Compilation message (stderr)

cezar.cpp: In function 'void dfs(int)':
cezar.cpp:21:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0 ; i < ng[a].size() ; i ++){
                     ~~^~~~~~~~~~~~~~
cezar.cpp: In function 'int main()':
cezar.cpp:67:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0 ; i <ord.size() ; i ++){
                     ~~^~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 10 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10