Submission #1010954

#	Time	Username	Problem	Language	Result	Execution time	Memory
1010954		doducanh	Sails (IOI07_sails)	C++14	70 / 100	1069 ms	3496 KiB

sails

#include <bits/stdc++.h>

using namespace std;
#define int long long
#define h first
#define k second
const int maxn=1e5;
pair<int,int>a[maxn+7];
int dem[maxn+7];
int n;
main()
{
    cin>>n;
    for(int i=1;i<=n;i++)cin>>a[i].h>>a[i].k;
    sort(a+1,a+n+1);
    for(int i=1;i<=n;i++){
        int k=a[i].k;
        int h=a[i].h;
        int pos=h-k;
        int l=pos,r=pos;
        if(pos){
            while(l>1&&dem[l-1]==dem[pos])l--;
            while(r<h&&dem[r+1]==dem[pos])r++;
        }

        for(int j=r+1;j<=h;j++)dem[j]++;
        for(int j=l;j<=l+(k-(h-r)-1);j++)dem[j]++;
//        for(int j=1;j<=5;j++)cout<<dem[j]<<" ";
//        cout<<"\n";
    }
    int ans=0;
    for(int i=1;i<=maxn;i++)ans+=1ll*dem[i]*(dem[i]-1)/2;
    cout<<ans;
    return 0;
}

Compilation message (stderr)

sails.cpp:11:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   11 | main()
      | ^~~~

• 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: 0 / 10
• Subtask 10: 0 / 10
• Subtask 11: 0 / 10