Submission #141678

#	Time	Username	Problem	Language	Result	Execution time	Memory
141678		mariusnicoli	Cover (COCI18_cover)	C++14	96 / 120	18 ms	2040 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;
long long sp[20010], SP[20010];

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-1].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;
    }

    sp[1] = d[1].dimx * d[1].dimy;
    for (i=2;i<=k;i++)
        sp[i] = d[i].dimx * d[i].dimy + sp[i-1];

    SP[k] = d[k].dimx * d[k].dimy;
    for (i=k-1;i>=1;i--)
        SP[i] = d[i].dimx * d[i].dimy + SP[i+1];

/**
    minx = -d[1].dimx/2;
    maxx = -minx
    miny = -d[k].dimy/2;
    maxy = -miny;
**/
    ///sol = d[1].dimx * d[k].dimy;

    for (i=1;i<=k;i++) {
        dp[i] = d[1].dimx*d[i].dimy;
        for (long long j=i;j>=2;j--) {
            dp[i] = min(dp[i], dp[j-1] + d[j].dimx * d[i].dimy);
        }
    }
    cout<<dp[k];

    return 0;
}

• Subtask 1: 96 / 120