Submission #920524

#	Time	Username	Problem	Language	Result	Execution time	Memory
920524		asdasdqwer	Sails (IOI07_sails)	C++14	100 / 100	180 ms	9296 KiB

sails

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

#define int int64_t

struct Segtree {
    int n;
    vector<int> mx;
    vector<int> mn;
    vector<int> upd;

    Segtree(int sz) {
        n=1;
        while (n<sz)n*=2;
        mx.assign(2*n,0);
        mn.assign(2*n,0);
        upd.assign(2*n,0);
    }

    void pushdown(int x) {
        if (upd[x] == 0) return;

        upd[2*x+1]+=upd[x];
        upd[2*x+2]+=upd[x];
        mx[2*x+1]+=upd[x];
        mx[2*x+2]+=upd[x];
        mn[2*x+1]+=upd[x];
        mn[2*x+2]+=upd[x];
        upd[x]=0;
    }

    int get(int i, int x, int lx, int rx) {
        if (rx-lx==1)return mx[x];
        pushdown(x);
        int m=(lx+rx)/2;
        if (i<m)return get(i,2*x+1,lx,m);
        else return get(i,2*x+2,m,rx);
    }

    int get(int i) {
        return get(i,0,0,n);
    }

    int first(int v, int x, int lx, int rx) {
        if (rx-lx==1) {
            return lx;
        }
        pushdown(x);
        int m=(lx+rx)/2;
        if (mx[2*x+1] >= v) return first(v, 2*x+1, lx, m);
        else return first(v, 2*x+2, m, rx);
    }

    int last(int v, int x, int lx, int rx) {
        if (rx-lx==1) {
            return lx;
        }
        pushdown(x);
        int m=(lx+rx)/2;
        if (mn[2*x+2] <= v) return last(v, 2*x+2, m, rx);
        else return last(v, 2*x+1, lx, m);
    }

    void inc(int l, int r, int x, int lx, int rx) {
        if (lx >= r || rx <= l) return;
        if (rx-lx==1) {
            mn[x]++;
            mx[x]++;
            return;
        }

        pushdown(x);

        if (lx >= l && rx <= r) {
            mx[x]++;
            mn[x]++;
            upd[x]++;
            return;
        }

        int m=(lx+rx)/2;
        inc(l, r, 2*x+1, lx, m);
        inc(l, r, 2*x+2, m, rx);

        mx[x]=max(mx[2*x+1], mx[2*x+2]);
        mn[x]=min(mn[2*x+1], mn[2*x+2]);
    }

    void inc(int l, int r) {
        if (r-l <= 0) return;
        inc(l, r, 0, 0, n);
    }

    void query(int size, int num) {
        int start = n - size;
        int end = start + num;
        int val = get(end-1);
        int f = first(val, 0, 0, n), s = last(val, 0, 0, n);
        f = max(f, start);
        inc(start, f);
        num -= f - start;
        inc(s - num + 1, s+1);
    }

    int res() {
        int rr=0;
        for (int i=0;i<n;i++) {
            int tmp=get(i);
            rr += (tmp*(tmp-1))/2;
        }
        return rr;
    }
};

signed main() {
    int n;cin>>n;
    vector<array<int,2>> v(n);
    for (auto &x:v) {
        cin>>x[0]>>x[1];
    }

    Segtree sg(100000);

    sort(v.begin(),v.end());

    for (auto &x:v) {
        sg.query(x[0], x[1]);
    }

    cout<<sg.res()<<"\n";
}

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 5 / 5
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10
• Subtask 11: 10 / 10