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Submission #1092806

# Submission time Handle Problem Language Result Execution time Memory
1092806 2024-09-25T07:28:02 Z alexander707070 Boat (APIO16_boat) C++14
31 / 100
 2000 ms 326900 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;
unordered_map<int,int> where;
 
pair<int,int> s[MAXN];
 
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=1;i<=n;i++){
        s[i]={where[a[i]],where[b[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,s[i].first-1,min(f,s[i].second)-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: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++)where[pos[i]]=i;
      |                 ~^~~~~~~~~~~
boat.cpp:54:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |     for(int i=0;i<pos.size();i++){
      |                 ~^~~~~~~~~~~
boat.cpp:59:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   59 |         for(int f=0;f<pos.size();f++){
      |                     ~^~~~~~~~~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 480 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 480 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 476 KB Output is correct
20 Correct 1 ms 348 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 480 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 480 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 476 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 39 ms 1108 KB Output is correct
22 Correct 38 ms 1108 KB Output is correct
23 Correct 37 ms 992 KB Output is correct
24 Correct 40 ms 1116 KB Output is correct
25 Correct 39 ms 1104 KB Output is correct
26 Correct 24 ms 852 KB Output is correct
27 Correct 25 ms 924 KB Output is correct
28 Correct 26 ms 916 KB Output is correct
29 Correct 27 ms 860 KB Output is correct
30 Correct 1441 ms 123956 KB Output is correct
31 Correct 1500 ms 122004 KB Output is correct
32 Correct 1474 ms 124024 KB Output is correct
33 Correct 1459 ms 121056 KB Output is correct
34 Correct 1441 ms 122076 KB Output is correct
35 Correct 1249 ms 117052 KB Output is correct
36 Correct 1388 ms 120636 KB Output is correct
37 Correct 1340 ms 121908 KB Output is correct
38 Correct 1352 ms 118268 KB Output is correct

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2062 ms 326900 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 480 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 480 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 476 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 39 ms 1108 KB Output is correct
22 Correct 38 ms 1108 KB Output is correct
23 Correct 37 ms 992 KB Output is correct
24 Correct 40 ms 1116 KB Output is correct
25 Correct 39 ms 1104 KB Output is correct
26 Correct 24 ms 852 KB Output is correct
27 Correct 25 ms 924 KB Output is correct
28 Correct 26 ms 916 KB Output is correct
29 Correct 27 ms 860 KB Output is correct
30 Correct 1441 ms 123956 KB Output is correct
31 Correct 1500 ms 122004 KB Output is correct
32 Correct 1474 ms 124024 KB Output is correct
33 Correct 1459 ms 121056 KB Output is correct
34 Correct 1441 ms 122076 KB Output is correct
35 Correct 1249 ms 117052 KB Output is correct
36 Correct 1388 ms 120636 KB Output is correct
37 Correct 1340 ms 121908 KB Output is correct
38 Correct 1352 ms 118268 KB Output is correct
39 Execution timed out 2062 ms 326900 KB Time limit exceeded
40 Halted 0 ms 0 KB -