oj.uz

Submission #1092690

# Submission time Handle Problem Language Result Execution time Memory
1092690 2024-09-24T18:23:09 Z alexander707070 Boat (APIO16_boat) C++14
9 / 100
 2000 ms 329072 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(){

    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:42:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |     for(int i=0;i<pos.size();i++)where[pos[i]]=i;
      |                 ~^~~~~~~~~~~
boat.cpp:44:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |     for(int i=0;i<pos.size();i++){
      |                 ~^~~~~~~~~~~
boat.cpp:49:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |         for(int f=0;f<pos.size();f++){
      |                     ~^~~~~~~~~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 344 KB Output is correct
2 Correct 5 ms 348 KB Output is correct
3 Correct 5 ms 348 KB Output is correct
4 Correct 5 ms 556 KB Output is correct
5 Correct 9 ms 604 KB Output is correct
6 Correct 5 ms 348 KB Output is correct
7 Correct 10 ms 348 KB Output is correct
8 Correct 5 ms 348 KB Output is correct
9 Correct 5 ms 348 KB Output is correct
10 Correct 5 ms 348 KB Output is correct
11 Correct 5 ms 552 KB Output is correct
12 Correct 5 ms 548 KB Output is correct
13 Correct 5 ms 348 KB Output is correct
14 Correct 5 ms 348 KB Output is correct
15 Correct 5 ms 352 KB Output is correct
16 Correct 1 ms 352 KB Output is correct
17 Correct 1 ms 352 KB Output is correct
18 Correct 1 ms 352 KB Output is correct
19 Correct 1 ms 352 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 5 ms 344 KB Output is correct
2 Correct 5 ms 348 KB Output is correct
3 Correct 5 ms 348 KB Output is correct
4 Correct 5 ms 556 KB Output is correct
5 Correct 9 ms 604 KB Output is correct
6 Correct 5 ms 348 KB Output is correct
7 Correct 10 ms 348 KB Output is correct
8 Correct 5 ms 348 KB Output is correct
9 Correct 5 ms 348 KB Output is correct
10 Correct 5 ms 348 KB Output is correct
11 Correct 5 ms 552 KB Output is correct
12 Correct 5 ms 548 KB Output is correct
13 Correct 5 ms 348 KB Output is correct
14 Correct 5 ms 348 KB Output is correct
15 Correct 5 ms 352 KB Output is correct
16 Correct 1 ms 352 KB Output is correct
17 Correct 1 ms 352 KB Output is correct
18 Correct 1 ms 352 KB Output is correct
19 Correct 1 ms 352 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 114 ms 1112 KB Output is correct
22 Correct 103 ms 1116 KB Output is correct
23 Correct 98 ms 1112 KB Output is correct
24 Correct 103 ms 1112 KB Output is correct
25 Correct 97 ms 1132 KB Output is correct
26 Correct 72 ms 856 KB Output is correct
27 Correct 66 ms 860 KB Output is correct
28 Correct 62 ms 972 KB Output is correct
29 Correct 65 ms 976 KB Output is correct
30 Execution timed out 2029 ms 127940 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 2107 ms 329072 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 344 KB Output is correct
2 Correct 5 ms 348 KB Output is correct
3 Correct 5 ms 348 KB Output is correct
4 Correct 5 ms 556 KB Output is correct
5 Correct 9 ms 604 KB Output is correct
6 Correct 5 ms 348 KB Output is correct
7 Correct 10 ms 348 KB Output is correct
8 Correct 5 ms 348 KB Output is correct
9 Correct 5 ms 348 KB Output is correct
10 Correct 5 ms 348 KB Output is correct
11 Correct 5 ms 552 KB Output is correct
12 Correct 5 ms 548 KB Output is correct
13 Correct 5 ms 348 KB Output is correct
14 Correct 5 ms 348 KB Output is correct
15 Correct 5 ms 352 KB Output is correct
16 Correct 1 ms 352 KB Output is correct
17 Correct 1 ms 352 KB Output is correct
18 Correct 1 ms 352 KB Output is correct
19 Correct 1 ms 352 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 114 ms 1112 KB Output is correct
22 Correct 103 ms 1116 KB Output is correct
23 Correct 98 ms 1112 KB Output is correct
24 Correct 103 ms 1112 KB Output is correct
25 Correct 97 ms 1132 KB Output is correct
26 Correct 72 ms 856 KB Output is correct
27 Correct 66 ms 860 KB Output is correct
28 Correct 62 ms 972 KB Output is correct
29 Correct 65 ms 976 KB Output is correct
30 Execution timed out 2029 ms 127940 KB Time limit exceeded
31 Halted 0 ms 0 KB -