Submission #851598

#	Time	Username	Problem	Language	Result	Execution time	Memory
851598		abcvuitunggio	Sails (IOI07_sails)	C++17	30 / 100	1042 ms	2000 KiB

sails

#include <bits/stdc++.h>
#define int long long
using namespace std;
int n,h,k,sum[100002],cnt[100002],res,cur,mx;
int32_t main(){
    ios_base::sync_with_stdio(NULL);cin.tie(nullptr);
    cin >> n;
    cnt[1]=n;
    while (n--){
        cin >> h >> k;
        mx=max(mx,h);
        cnt[h+1]--;
        sum[h-k+1]++;
        sum[h+1]--;
        cur+=k;
    }
    for (int i=1;i<=100001;i++){
        cnt[i]+=cnt[i-1];
        sum[i]+=sum[i-1];
    }
    for (int i=100000;i>=1;i--)
        sum[i]+=sum[i+1];
    for (int i=1;i<=mx;i++){
        if (!cur)
            break;
        int l=0,r=cnt[i],kq=-1;
        while (l<=r){
            int mid=(l+r)>>1,amount=0;
            for (int j=mx;j>=i;j--)
                amount=min(amount+mid,sum[j]);
            if (amount>=cur){
                kq=mid;
                r=mid-1;
            }
            else
                l=mid+1;
        }
        cur-=kq;
        res+=1LL*kq*(kq-1)/2;
    }
    cout << res;
}

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 5 / 5
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10
• Subtask 11: 0 / 10