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Submission #851611

# Submission time Handle Problem Language Result Execution time Memory
851611 2023-09-20T09:08:39 Z abcvuitunggio Sails (IOI07_sails) C++17
100 / 100
 42 ms 4980 KB 
#include <bits/stdc++.h>
#define int long long
using namespace std;
int n,h,k,a[100002],sum,res;
pair <int, int> p[100001];
set <int> s;
void update(int i, int j){
    a[i]+=j;
    if (a[i])
        s.insert(i);
    else
        s.erase(i);
}
int32_t main(){
    ios_base::sync_with_stdio(NULL);cin.tie(nullptr);
    cin >> n;
    for (int i=1;i<=n;i++)
        cin >> p[i].first >> p[i].second;
    sort(p+1,p+n+1);
    s.insert(1);
    s.insert(100001);
    for (int i=1;i<=n;i++){
        auto [h,k]=p[i];
        if (a[h-k+1]){
            update(h-k+1,1);
            update(h+1,-1);
            continue;
        }
        auto it=s.lower_bound(h-k+1);
        int r=*it;
        r--;
        it--;
        int l=*it;
        r=min(r,h);
        update(l,1);
        update(l+r-h+k,-1);
        update(h+1,-1);
        update(r+1,1);
    }
    for (int i=1;i<=100000;i++){
        sum+=a[i];
        res+=sum*(sum-1)/2;
    }
    cout << res;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 344 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 1112 KB Output is correct

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 860 KB Output is correct
2 Correct 11 ms 3160 KB Output is correct

Subtask #7
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 3904 KB Output is correct

Subtask #8
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 2904 KB Output is correct

Subtask #9
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 2896 KB Output is correct
2 Correct 25 ms 4376 KB Output is correct

Subtask #10
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 4980 KB Output is correct
2 Correct 24 ms 3620 KB Output is correct

Subtask #11
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 3428 KB Output is correct
2 Correct 24 ms 2648 KB Output is correct