oj.uz

Submission #439065

# Submission time Handle Problem Language Result Execution time Memory
439065 2021-06-29T07:18:45 Z skyberg Mountains (NOI20_mountains) C++17
0 / 100
 2000 ms 4984 KB 
#include <iostream>
#include <vector>
#include <cstring>
#include <algorithm>
using namespace std;
int t[1200000];
int g[300000];
int left1[300000], right1[300000];
void update (int v, int tl, int tr, int h) {
    if (tl == tr)
        t[v]++;
    else {
        int tm = (tl + tr) / 2;
        if (h <= tm)
            update (v*2, tl, tm, h);
        else
            update (v*2+1, tm+1, tr, h);
        t[v] = t[v*2] + t[v*2+1];
    }
}
int sum (int v, int tl, int tr, int l, int r) {
    if (l > r)
        return 0;
    if (l == tl && r == tr)
        return t[v];
    int tm = (tl + tr) / 2;
    return sum (v*2, tl, tm, l, min(r,tm))
           + sum (v*2+1, tm+1, tr, max(l,tm+1), r);
}
int main(){
    int n;
    cin >> n;
    for(int i = 0; i < n; i++){
        cin >> g[i];
    }
    update(1, 0, n, g[0]);
    for(int i = 1; i < n - 1; i++){
        left1[i] = sum(1, 0, n, 0, g[i] - 1);
        update(1, 0, n, g[i]);
    }
    memset(t, 0, sizeof(t[0]) * 300000);
    update(1, 0, n, g[n - 1]);
    for(int i = n - 2; i >= 1; i--){
        right1[i] = sum(1, 0, n, 0, g[i] - 1);
        update(1, 0, n, g[i]);
    }
    long long int ans = 0;
    for(int i = 1; i < n - 1; i++){
        ans += left1[i] * right1[i];
    }
    cout << ans;
    return 0;
}

Compilation message

Mountains.cpp: In function 'int main()':
Mountains.cpp:41:39: warning: 'memset' used with length equal to number of elements without multiplication by element size [-Wmemset-elt-size]
   41 |     memset(t, 0, sizeof(t[0]) * 300000);
      |                                       ^

Subtask #1
0 / 2.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2100 ms 204 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #2
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 175 ms 4984 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 9.0

# Verdict Execution time Memory Grader output
1 Incorrect 175 ms 4984 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 36.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 1484 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 28.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 1484 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 9.0

# Verdict Execution time Memory Grader output
1 Incorrect 175 ms 4984 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 12.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2100 ms 204 KB Time limit exceeded
2 Halted 0 ms 0 KB -