Submission #145109

#	Time	Username	Problem	Language	Result	Execution time	Memory
145109		MihneaHedea	Cover (COCI18_cover)	C++14	120 / 120	16 ms	1912 KiB

cover

#include <iostream>
#include <set>
 
using namespace std;
struct elem {
    long long x;
    long long y;
};
 
struct dreptunghi {
    long long dimx;
    long long dimy;
};
 
set<pair<long long, long long> > s;
elem v[20010];
dreptunghi d[20010];
long long dp[20010];
long long n, k, i, x, y, minim, maxim, sol;
 
int main () {
 
    cin>>n;
    for (i=1;i<=n;i++) {
        cin>>x>>y;
        s.insert(make_pair(x, y));
        s.insert(make_pair(-x, y));
        s.insert(make_pair(x, -y));
        s.insert(make_pair(-x, -y));
    }
 
    n = 0;
    for (set<pair<long long, long long> >::iterator it = s.begin(); it!=s.end(); it++) {
        v[++n].x = it->first;
        v[n].y = it->second;
    }
 
    minim = v[1].y;
    maxim = v[1].y;
    for (i=2;i<=n;i++) {
        if (v[i].x >= 0)
            break;
        if (v[i].x == v[i-1].x) {
            maxim = max(maxim, v[i].y);
            minim = min(minim, v[i].y);
        } else {
            if (k == 0 || maxim-minim > d[k].dimy) {
                d[++k].dimx = -v[i-1].x*2;
                d[k].dimy = maxim - minim;
            }
            maxim = v[i].y;
            minim = v[i].y;
        }
    }
    if (k == 0 || maxim-minim > d[k].dimy) {
        d[++k].dimx = -v[i-1].x * 2;
        d[k].dimy = maxim - minim;
    }
 
    for (i=1;i<=k;i++) {
        dp[i] = d[1].dimx*d[i].dimy;
        for (long long j=i;j>=1;j--) {
            dp[i] = min(dp[i], dp[j-1] + d[j].dimx * d[i].dimy);
        }
    }
    cout<<dp[k];
 
    return 0;
}

• Subtask 1: 120 / 120