Submission #863408

#	Time	Username	Problem	Language	Result	Execution time	Memory
863408		8pete8	Sails (IOI07_sails)	C++14	100 / 100	76 ms	2640 KiB

sails

#include<iostream>
#include<stack>
#include<map>
#include<vector>
#include<string>
#include<unordered_map>
#include <queue>
#include<cstring>
#include<limits.h>
#include<cmath>
#include<set>
#include<algorithm>
#include<bitset>
using namespace std;
#define ll long long
#define f first
#define endl "\n"
#define s second
#define pii pair<int,int>
#define ppii pair<pii,pii>
#define vi vector<int>
#define pb push_back
//#define p push
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define F(n) for(int i=0;i<n;i++)
#define lb lower_bound
#define ub upper_bound
#define fastio ios::sync_with_stdio(false);cin.tie(NULL);
using namespace std;
#define int long long
const int mod=9901,mxn=2*1e5+5,inf=1e18,lg=25,minf=-1e18;
int fwk[mxn+10];
void update(int pos,int val){for(int i=pos;i<mxn;i+=(i&-i))fwk[i]+=val;}
int qry(int pos){
    int sum=0;
    for(int i=pos;i>0;i-=(i&-i))sum+=fwk[i];
    return sum;
}
int32_t main(){
    fastio
    int n;cin>>n;
    vector<pii>v(n);
    for(int i=0;i<n;i++)cin>>v[i].f>>v[i].s;
    sort(all(v));
    for(auto i:v){
        int cmn=qry(i.f-i.s+1);
        int l=1,r=i.f;
        int pos=minf;
        while(l<=r){
            int mid=l+(r-l)/2;
            if(qry(mid)>=cmn)l=mid+1,pos=max(pos,mid);
            else r=mid-1;
        }
        update(pos+1,1);
        update(i.f+1,-1);
        int diff=i.s-(i.f-pos);
        if(diff<=0)continue;
        l=1,r=i.f;
        int pos2=inf;
        while(l<=r){
            int mid=l+(r-l)/2;
            if(qry(mid)<=cmn)r=mid-1,pos2=min(pos2,mid);
            else l=mid+1;
        }
        update(pos2,1);
        update(pos2+diff,-1);
    }
    int ans=0,k;
    for(int i=1;i<mxn;i++){
        k=qry(i)-1;
        ans+=(k*(k+1))/2;
    }
    cout<<ans;
    
}

• 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