Submission #1041247

#	Time	Username	Problem	Language	Result	Execution time	Memory
1041247		noyancanturk	Aliens (IOI16_aliens)	C++17	25 / 100	2074 ms	22364 KiB

aliens

#include "aliens.h"

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

using lint=int64_t;
using pii=pair<lint,lint>;

#define pb push_back


long long take_photos(int n, int m, int k, std::vector<int> r, std::vector<int> c) {
    for(int i=0;i<n;i++){
        if(c[i]<r[i]){
            swap(c[i],r[i]);
        }
    }
    int points[m+1];
    memset(points,-1,sizeof(points));
    for(int i=0;i<n;i++){
        points[r[i]]=max(points[r[i]],c[i]);
    }
    vector<pii>pts;
    for(int i=0;i<=m;i++){
        if(points[i]!=-1){
            if(!pts.size()||pts.back().second<points[i]){
                pts.pb(pii{i,points[i]});
            }
        }
    }
    n=pts.size();
    lint ans[n+1][k+1];
    for(int i=0;i<=n;i++)for(int j=0;j<=k;j++)ans[i][j]=LLONG_MAX;
    ans[0][0]=0;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=min(i,k);j++){
            for(int past=0;past<i;past++){
                if(ans[past][j-1]==LLONG_MAX)continue;
                lint val=ans[past][j-1]
                    +(pts[i-1].second-pts[past].first+1)*(pts[i-1].second-pts[past].first+1)
                    -(past&&pts[past].first<=pts[past-1].second?
                        (pts[past-1].second-pts[past].first+1)*(pts[past-1].second-pts[past].first+1)
                        :0);
                //cerr<<i<<" "<<j<<" "<<past<<" :: "<<val<<" "<<(pts[i-1].second-pts[past].first+1)*(pts[i-1].second-pts[past].first+1)<<"\n";
                ans[i][j]=min(ans[i][j],val);
            }
            //cerr<<ans[i][j]<<" ";
        }
        //cerr<<"\n";
    }
    lint anss=LLONG_MAX;
    for(int i=1;i<=k;i++){
        anss=min(anss,ans[n][i]);
    }
    return anss;
}

• Subtask 1: 4 / 4
• Subtask 2: 12 / 12
• Subtask 3: 9 / 9
• Subtask 4: 0 / 16
• Subtask 5: 0 / 19
• Subtask 6: 0 / 40