제출 #883662

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
883662		vjudge1	Pohlepko (COCI16_pohlepko)	C++17	80 / 80	47 ms	4700 KiB

pohlepko

#ifndef Local
    #pragma GCC optimize("O3,unroll-loops")
    const int lim=2e5+100;
#else
    const int lim=1e3+100;
#endif

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

#define int long long
#define pb push_back

const int mod=1e9+7;
using pii=pair<int,int>;

inline void solve(){
    int n,m;
    cin>>n>>m;
    string s[n];
    for(int i=0;i<n;i++){
        cin>>s[i];
    }
    string res={s[0][0]};
    set<pii>all{{0,0}},nexty;
    for(int i=1;i<n+m-1;i++){
        char mini=CHAR_MAX;
        for(pii cor:all){
            if(cor.first+1<n){
                if(s[cor.first+1][cor.second]==mini){
                    nexty.insert({cor.first+1,cor.second});
                }else if(s[cor.first+1][cor.second]<mini){
                    nexty.clear();
                    nexty.insert({cor.first+1,cor.second});
                    mini=s[cor.first+1][cor.second];
                }
            }
            if(cor.second+1<m){
                if(s[cor.first][cor.second+1]==mini){
                    nexty.insert({cor.first,cor.second+1});
                }else if(s[cor.first][cor.second+1]<mini){
                    nexty.clear();
                    nexty.insert({cor.first,cor.second+1});
                    mini=s[cor.first][cor.second+1];
                }
            }
        }
        res.pb(mini);
        swap(nexty,all);
        nexty.clear();
    }
    cout<<res<<"\n";
}

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);cout.tie(NULL);
#ifdef Local  
    freopen(".in","r",stdin);
    freopen(".out","w",stdout);
#else
    //freopen("grass.in","r",stdin);
    //freopen("grass.out","w",stdout);
#endif
    int t=1;
    //cin>>t;
    while (t--)
    {
        solve();
    }
}

• Subtask 1: 80 / 80