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Submission #818665

# Submission time Handle Problem Language Result Execution time Memory
818665 2023-08-10T06:11:44 Z 반딧불(#10131) Fish 2 (JOI22_fish2) C++17
8 / 100
 960 ms 5292 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
const ll INF = 1e18;

struct segTree{
    int cnt[400002], sum[400002];

    void update(int i, int l, int r, int s, int e, int v){
        if(r<s || e<l) return;
        if(s<=l && r<=e){
            cnt[i] += v;
            sum[i] = cnt[i] ? r-l+1 : l==r ? 0 : sum[i*2] + sum[i*2+1];
            return;
        }
        int m = (l+r)>>1;
        update(i*2, l, m, s, e, v);
        update(i*2+1, m+1, r, s, e, v);
        sum[i] = cnt[i] ? r-l+1 : l==r ? 0 : sum[i*2] + sum[i*2+1];
    }

    int query(int i, int l, int r, int s, int e){
        if(cnt[i]) return max(0, min(r, e) - max(l, s) + 1);
        if(r<s || e<l) return 0;
        if(s<=l && r<=e) return sum[i];
        int m = (l+r)>>1;
        return query(i*2, l, m, s, e) + query(i*2+1, m+1, r, s, e);
    }
} tree;

int n, q;
ll arr[100005];
ll sum[100005];

int main(){
    scanf("%d", &n);
    for(int i=1; i<=n; i++) scanf("%lld", &arr[i]);
    for(int i=1; i<=n+1; i++) sum[i] = sum[i-1] + arr[i];

    vector<pair<int, ll> > vec;
    vec.push_back(make_pair(0, INF));
    for(int i=1; i<=n+1; i++){
        while(!vec.empty() && vec.back().second <= (i==n+1?INF:arr[i])){
            int l = vec.back().first, r = i;
            if(l==0 && r==n+1) break;
            vec.pop_back();
            if(sum[r-1] - sum[l] < min(l==0?INF:arr[l], r==n+1?INF:arr[r])) tree.update(1, 1, n, l+1, r-1, 1);
        }
        int l = vec.back().first, r = i;
        if(!(l==0 && r==n+1) && sum[r-1] - sum[l] < min(l==0?INF:arr[l], r==n+1?INF:arr[r]))
            tree.update(1, 1, n, l+1, r-1, 1);
        vec.push_back(make_pair(i, arr[i]));
    }

    scanf("%d", &q);
    for(int i=1; i<=q; i++){
        int t, l, r;
        scanf("%d %d %d", &t, &l, &r);

        vector<pair<int, int> > updates;
        for(int d=0; d<50; d++){ /// l ~ ?
            auto it = lower_bound(sum+1, sum+n+1, sum[l-1] + (1LL<<d));
            if(it >= sum+r+1) break;
            int s = l-1, e = it - sum;
            if(arr[e] > sum[e-1] - sum[s] && s+1<e){
                updates.push_back(make_pair(s+1, e-1));
                tree.update(1, 1, n, s+1, e-1, 1);
            }
        }
        for(int d=0; d<50; d++){ /// ? ~ r
            auto it = upper_bound(sum+1, sum+n+1, sum[r] - (1LL<<d)) - 1;
            if(it <= sum+l-1) break;
            int s = it - sum, e = r+1;
            if(arr[s] > sum[e-1] - sum[s] && s+1<e){
                updates.push_back(make_pair(s+1, e-1));
                tree.update(1, 1, n, s+1, e-1, 1);
            }
        }

        printf("%d\n", (r-l+1) - tree.query(1, 1, n, l, r));

        for(auto [l, r]: updates){
            tree.update(1, 1, n, l, r, -1);
        }
    }
}

Compilation message

fish2.cpp: In function 'int main()':
fish2.cpp:38:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
fish2.cpp:39:34: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |     for(int i=1; i<=n; i++) scanf("%lld", &arr[i]);
      |                             ~~~~~^~~~~~~~~~~~~~~~~
fish2.cpp:57:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   57 |     scanf("%d", &q);
      |     ~~~~~^~~~~~~~~~
fish2.cpp:60:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   60 |         scanf("%d %d %d", &t, &l, &r);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 30 ms 3896 KB Output is correct
3 Correct 28 ms 3872 KB Output is correct
4 Correct 29 ms 3816 KB Output is correct
5 Correct 27 ms 3816 KB Output is correct
6 Correct 30 ms 3736 KB Output is correct
7 Correct 21 ms 3828 KB Output is correct
8 Correct 25 ms 3724 KB Output is correct
9 Correct 25 ms 3808 KB Output is correct
10 Correct 25 ms 3848 KB Output is correct
11 Correct 24 ms 3792 KB Output is correct
12 Correct 23 ms 3856 KB Output is correct
13 Correct 22 ms 3800 KB Output is correct
14 Correct 26 ms 3788 KB Output is correct
15 Correct 27 ms 3804 KB Output is correct

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 30 ms 3896 KB Output is correct
3 Correct 28 ms 3872 KB Output is correct
4 Correct 29 ms 3816 KB Output is correct
5 Correct 27 ms 3816 KB Output is correct
6 Correct 30 ms 3736 KB Output is correct
7 Correct 21 ms 3828 KB Output is correct
8 Correct 25 ms 3724 KB Output is correct
9 Correct 25 ms 3808 KB Output is correct
10 Correct 25 ms 3848 KB Output is correct
11 Correct 24 ms 3792 KB Output is correct
12 Correct 23 ms 3856 KB Output is correct
13 Correct 22 ms 3800 KB Output is correct
14 Correct 26 ms 3788 KB Output is correct
15 Correct 27 ms 3804 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Incorrect 960 ms 5292 KB Output isn't correct
18 Halted 0 ms 0 KB -

Subtask #5
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 30 ms 3896 KB Output is correct
3 Correct 28 ms 3872 KB Output is correct
4 Correct 29 ms 3816 KB Output is correct
5 Correct 27 ms 3816 KB Output is correct
6 Correct 30 ms 3736 KB Output is correct
7 Correct 21 ms 3828 KB Output is correct
8 Correct 25 ms 3724 KB Output is correct
9 Correct 25 ms 3808 KB Output is correct
10 Correct 25 ms 3848 KB Output is correct
11 Correct 24 ms 3792 KB Output is correct
12 Correct 23 ms 3856 KB Output is correct
13 Correct 22 ms 3800 KB Output is correct
14 Correct 26 ms 3788 KB Output is correct
15 Correct 27 ms 3804 KB Output is correct
16 Runtime error 1 ms 468 KB Execution killed with signal 11
17 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -