oj.uz

Submission #722814

# Submission time Handle Problem Language Result Execution time Memory
722814 2023-04-12T23:13:16 Z n0sk1ll Boat (APIO16_boat) C++14
9 / 100
 1858 ms 4228 KB 
#include <bits/stdc++.h>

#define FAST ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);cerr.tie(0)
#define mp make_pair
#define xx first
#define yy second
#define pb push_back
#define pf push_front
#define popb pop_back
#define popf pop_front
#define all(x) x.begin(),x.end()
#define ff(i,a,b) for (int i = a; i < b; i++)
#define fff(i,a,b) for (int i = a; i <= b; i++)
#define bff(i,a,b) for (int i = b-1; i >= a; i--)
#define bfff(i,a,b) for (int i = b; i >= a; i--)

using namespace std;
long double typedef ld;
unsigned int typedef ui;
long long int typedef li;
pair<int,int> typedef pii;
pair<li,li> typedef pli;
pair<ld,ld> typedef pld;
vector<vector<int>> typedef graph;
unsigned long long int typedef ull;
//const int mod = 998244353;
const int mod = 1000000007;







//Note to self: Check for overflow

int a[503],b[503];
int dp[2200006];

int solve3v(int n)
{
    dp[0]=1;
    fff(i,1,n) fff(j,0,i-1) if (a[i]>a[j]) (dp[i]+=dp[j])%=mod;

    int ans=0;
    fff(i,1,n) (ans+=dp[i])%=mod;
    return ans;
}

vector<pair<pii,int>> segs;

int solve(int n)
{
    int shift=0;
    fff(i,1,n) segs.pb({{a[i],b[i]},i});
    sort(all(segs));

    int maxr=0;
    for (auto it : segs)
    {
        if (it.xx.xx>maxr) shift=it.xx.xx-(maxr+1);
        a[it.yy]=it.xx.xx-shift,b[it.yy]=it.xx.yy-shift;
        maxr=max(maxr,it.xx.yy-shift);
    }

    dp[0]=1;
    fff(i,1,n)
    {
        int tsum=0;
        fff(s,0,1'000'001)
        {
            (tsum+=dp[s])%=mod;
            if (a[i]<=s && s<=b[i]) dp[s]=tsum;
        }

        //cout<<i<<": "; cout<<"["<<a[i]<<","<<b[i]<<"] --- ";
        //fff(s,0,10) cout<<dp[s]<<" "; cout<<endl;
    }

    int ans=0;
    fff(s,1,1'000'001) (ans+=dp[s])%=mod;
    return ans;
}

int main()
{
    FAST;

    int n; cin>>n;
    fff(i,1,n) cin>>a[i]>>b[i];

    bool radi3v=true;
    fff(i,1,n) if (a[i]!=b[i]) radi3v=false;

    if (radi3v) cout<<solve3v(n)<<"\n";
    else cout<<solve(n)<<"\n";
}

//Note to self: Check for overflow

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 2 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct

Subtask #2
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 2 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1834 ms 364 KB Output is correct
22 Correct 1858 ms 364 KB Output is correct
23 Correct 1835 ms 364 KB Output is correct
24 Correct 1834 ms 364 KB Output is correct
25 Correct 1815 ms 364 KB Output is correct
26 Correct 1821 ms 484 KB Output is correct
27 Correct 1815 ms 340 KB Output is correct
28 Correct 1842 ms 360 KB Output is correct
29 Correct 1848 ms 468 KB Output is correct
30 Incorrect 1841 ms 4228 KB Output isn't correct
31 Halted 0 ms 0 KB -

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Incorrect 385 ms 4168 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 2 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1834 ms 364 KB Output is correct
22 Correct 1858 ms 364 KB Output is correct
23 Correct 1835 ms 364 KB Output is correct
24 Correct 1834 ms 364 KB Output is correct
25 Correct 1815 ms 364 KB Output is correct
26 Correct 1821 ms 484 KB Output is correct
27 Correct 1815 ms 340 KB Output is correct
28 Correct 1842 ms 360 KB Output is correct
29 Correct 1848 ms 468 KB Output is correct
30 Incorrect 1841 ms 4228 KB Output isn't correct
31 Halted 0 ms 0 KB -