Submission #412431

#	Time	Username	Problem	Language	Result	Execution time	Memory
412431		Dakto	Sails (IOI07_sails)	C++17	0 / 100	78 ms	3364 KiB

sails

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

int main(){
    int n;
    cin>>n;
    vector<pair<int,int>> v(n);
    for(int i=0; i<n; i++) cin>>v[i].first>>v[i].second;
    long long res=1e16;
    long long s=0;
    for(auto i:v) s+=i.second;

    vector<long long> da(100000,0), cnt(100050,0), nv(100005,0);
    for(auto i:v){
        da[i.first]++;
        da[i.first-i.second]--;
        cnt[i.first]++;
    } 

    for(int i=100000; i>=1; i--){
        nv[i]=nv[i+1]+da[i];
        cnt[i]+=cnt[i+1];
    }

    auto check=[&](long long c){
        long long v=0;
        long long tr=0;
        long long ts=0;
        for(int i=100000; i>=1; i--){
            v+=da[i];
            int d=min(min(v,cnt[i]),c-(s-ts<=i?1:0));
            tr+=d*(d-1)/2;
            v-=d;
            ts+=nv[i];
        }
        if(!v) res=min(res,tr);
        return v==0;
    };
    int l=1, r=1e5;
    while(l<r){
        int m=(l+r)/2;
        if(check(m)) r=m;
        else l=m+1;
    }
    cout<<res<<endl;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 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