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Submission #1092691

# Submission time Handle Problem Language Result Execution time Memory
1092691 2024-09-24T18:23:48 Z alexander707070 Boat (APIO16_boat) C++14
9 / 100
 2000 ms 323816 KB 
#include<bits/stdc++.h>
#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")

#define MAXN 507
using namespace std;

const long long mod=1e9+7;

int n,a[MAXN],b[MAXN];
vector<int> pos;
map<int,bool> mp;
map<int,int> where;

long long dp[2][1000007];
long long pref[2][1000007];

long long sum(int id,int from,int to){
    if(from>to)return 0;

    if(from>0)return (pref[id][to]-pref[id][from-1]);
    return pref[id][to];
}

int main(){

    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>a[i]>>b[i];

        for(int f=a[i];f<=b[i];f++){
            if(mp[f])continue;

            mp[f]=true;
            pos.push_back(f);
        }
    }

    pos.push_back(0);
    sort(pos.begin(),pos.end());

    for(int i=0;i<pos.size();i++)where[pos[i]]=i;

    for(int i=0;i<pos.size();i++){
        pref[0][i]=i+1; dp[0][i]=1;
    }

    for(int i=1;i<=n;i++){
        for(int f=0;f<pos.size();f++){

            dp[i%2][f]=(sum(1-i%2,where[a[i]]-1,min(f,where[b[i]])-1) + dp[1-i%2][f])%mod; 

            pref[i%2][f]=dp[i%2][f];
            if(f>0)pref[i%2][f]+=pref[i%2][f-1];
        }
    }

    cout<<dp[n%2][pos.size()-1]-1<<"\n";
 
    return 0;
}

Compilation message

boat.cpp: In function 'int main()':
boat.cpp:46:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |     for(int i=0;i<pos.size();i++)where[pos[i]]=i;
      |                 ~^~~~~~~~~~~
boat.cpp:48:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |     for(int i=0;i<pos.size();i++){
      |                 ~^~~~~~~~~~~
boat.cpp:53:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |         for(int f=0;f<pos.size();f++){
      |                     ~^~~~~~~~~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 348 KB Output is correct
2 Correct 4 ms 348 KB Output is correct
3 Correct 5 ms 344 KB Output is correct
4 Correct 5 ms 348 KB Output is correct
5 Correct 4 ms 568 KB Output is correct
6 Correct 4 ms 348 KB Output is correct
7 Correct 4 ms 348 KB Output is correct
8 Correct 5 ms 568 KB Output is correct
9 Correct 4 ms 348 KB Output is correct
10 Correct 4 ms 348 KB Output is correct
11 Correct 4 ms 568 KB Output is correct
12 Correct 5 ms 348 KB Output is correct
13 Correct 4 ms 348 KB Output is correct
14 Correct 5 ms 348 KB Output is correct
15 Correct 5 ms 344 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct

Subtask #2
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 348 KB Output is correct
2 Correct 4 ms 348 KB Output is correct
3 Correct 5 ms 344 KB Output is correct
4 Correct 5 ms 348 KB Output is correct
5 Correct 4 ms 568 KB Output is correct
6 Correct 4 ms 348 KB Output is correct
7 Correct 4 ms 348 KB Output is correct
8 Correct 5 ms 568 KB Output is correct
9 Correct 4 ms 348 KB Output is correct
10 Correct 4 ms 348 KB Output is correct
11 Correct 4 ms 568 KB Output is correct
12 Correct 5 ms 348 KB Output is correct
13 Correct 4 ms 348 KB Output is correct
14 Correct 5 ms 348 KB Output is correct
15 Correct 5 ms 344 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 111 ms 984 KB Output is correct
22 Correct 91 ms 988 KB Output is correct
23 Correct 92 ms 992 KB Output is correct
24 Correct 93 ms 1108 KB Output is correct
25 Correct 96 ms 1104 KB Output is correct
26 Correct 62 ms 976 KB Output is correct
27 Correct 60 ms 848 KB Output is correct
28 Correct 58 ms 860 KB Output is correct
29 Correct 66 ms 848 KB Output is correct
30 Execution timed out 2032 ms 128180 KB Time limit exceeded
31 Halted 0 ms 0 KB -

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2073 ms 323816 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 348 KB Output is correct
2 Correct 4 ms 348 KB Output is correct
3 Correct 5 ms 344 KB Output is correct
4 Correct 5 ms 348 KB Output is correct
5 Correct 4 ms 568 KB Output is correct
6 Correct 4 ms 348 KB Output is correct
7 Correct 4 ms 348 KB Output is correct
8 Correct 5 ms 568 KB Output is correct
9 Correct 4 ms 348 KB Output is correct
10 Correct 4 ms 348 KB Output is correct
11 Correct 4 ms 568 KB Output is correct
12 Correct 5 ms 348 KB Output is correct
13 Correct 4 ms 348 KB Output is correct
14 Correct 5 ms 348 KB Output is correct
15 Correct 5 ms 344 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 111 ms 984 KB Output is correct
22 Correct 91 ms 988 KB Output is correct
23 Correct 92 ms 992 KB Output is correct
24 Correct 93 ms 1108 KB Output is correct
25 Correct 96 ms 1104 KB Output is correct
26 Correct 62 ms 976 KB Output is correct
27 Correct 60 ms 848 KB Output is correct
28 Correct 58 ms 860 KB Output is correct
29 Correct 66 ms 848 KB Output is correct
30 Execution timed out 2032 ms 128180 KB Time limit exceeded
31 Halted 0 ms 0 KB -