Submission #940874

#	Time	Username	Problem	Language	Result	Execution time	Memory
940874		codefox	Sails (IOI07_sails)	C++14	0 / 100	5 ms	7000 KiB

sails

#include<bits/stdc++.h> 

using namespace std;

#define int long long

int N = 1<<17;
vector<int> bpro(2*N, 0);
vector<int> bmin(2*N, 0);

void update(int curr, int l, int r, int ll, int rr, int p)
{
    if (l >= rr || r <= ll) 
    {
        bpro[curr]+=p;
        bmin[curr]+=p;
        return;
    }
    if (l >= ll && r <= rr)
    {
        bpro[curr]+=p+1;
        bmin[curr]+=p+1;
        return;
    }

    p += bpro[curr];
    bpro[curr] = 0;

    int m = (l+r)/2;
    update(curr*2, l, m, ll, rr, p);
    update(curr*2+1, m, r, ll, rr, p);
    bmin[curr] = min(bmin[curr*2], bmin[curr*2+1]);
}

int32_t main()
{
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);

    int n;
    cin >> n;
    vector<vector<int>> height(1e5+1);

    int left = 0;

    for (int i = 0; i < n; i++)
    {
        int a, b;
        cin >> a >> b;
        height[a].push_back(b);
        left += b;
    }
    int sol = 0;

    int upper = 1e5;

    for (int i = 1e5; i > 0; i--)
    {
        sort(height[i].begin(), height[i].end(), greater<int>());
        for (int ele:height[i])
        {
            int b = ceil(left/(double)upper);
            int uh;
            do
            {    
                uh = bmin[upper+N];
                int curr = upper+N;
                while (curr>1)
                {
                    curr/=2;
                    uh+=bpro[curr];
                }
                if (uh >= b) 
                {
                    upper--;
                    left -= uh;
                }
            }
            while (uh >=b);

            //int s = search(1, 0, N, i+1, b, 0)+1;
            //cout << bmin[N+s-1] << " " << s-ele << " " << s << endl;
            update(1, 0, N, upper-ele+1, upper+1, 0);
        }
        int h = bmin[i+N];
        int curr = i+N;
        while (curr>1)
        {
            curr/=2;
            h+=bpro[curr];
        }
        sol += (h*(h-1))/2;
        if (upper == i) 
        {
            left -= h;
            upper--;
        }
    }
    cout << sol << "\n";

    return 0;
}

Compilation message (stderr)

sails.cpp: In function 'int32_t main()':
sails.cpp:37:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |     freopen("input.txt", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
sails.cpp:38:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |     freopen("output.txt", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• 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