답안 #549774

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
549774 2022-04-16T13:40:30 Z krit3379 Boat (APIO16_boat) C++17
100 / 100
1210 ms 4452 KB
#include<bits/stdc++.h>
using namespace std;
#define N 505

long long dp[N][2*N],a[N],b[N],len[2*N],inv[N],cnt,ch,mod=1e9+7;
vector<long long> v;

int main(){
    int n,i,j,k;
    scanf("%d",&n);
    inv[1]=1;
    for(i=2;i<N;i++)inv[i]=(mod-mod/i)*inv[mod%i]%mod;
    for(i=1;i<=n;i++)scanf("%lld %lld",&a[i],&b[i]),v.push_back(a[i]),v.push_back(b[i]+1);
    sort(v.begin(),v.end());
    v.resize(unique(v.begin(),v.end())-v.begin());
    for(i=1;i<=n;i++){
        a[i]=upper_bound(v.begin(),v.end(),a[i])-v.begin();
        b[i]=upper_bound(v.begin(),v.end(),b[i])-v.begin();
    }
    for(i=1;i<v.size();i++)len[i]=v[i]-v[i-1];
    for(i=0;i<v.size();i++)dp[0][i]=1;
    for(i=1;i<=n;i++){
        for(j=a[i];j<=b[i];j++){
            dp[i][j]=len[j]*dp[i-1][j-1]%mod;
            cnt=1,ch=len[j]-1;
            for(k=i-1;k>0;k--){
                if(a[k]<=j&&j<=b[k]){
                    cnt++;
                    ch=ch*(len[j]+cnt-2)%mod*inv[cnt]%mod;
                    if(!ch)break;
                    dp[i][j]=(dp[i][j]+dp[k-1][j-1]*ch)%mod;
                }
            }
        }
        dp[i][0]=1;
        for(j=1;j<v.size();j++)
            dp[i][j]=(dp[i][j]+dp[i-1][j]+dp[i][j-1]-dp[i-1][j-1]+mod)%mod;
    }
    printf("%lld",(dp[n][v.size()-1]-1+mod)%mod);
    return 0;
}

Compilation message

boat.cpp: In function 'int main()':
boat.cpp:20:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |     for(i=1;i<v.size();i++)len[i]=v[i]-v[i-1];
      |             ~^~~~~~~~~
boat.cpp:21:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |     for(i=0;i<v.size();i++)dp[0][i]=1;
      |             ~^~~~~~~~~
boat.cpp:36:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |         for(j=1;j<v.size();j++)
      |                 ~^~~~~~~~~
boat.cpp:10:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
boat.cpp:13:27: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |     for(i=1;i<=n;i++)scanf("%lld %lld",&a[i],&b[i]),v.push_back(a[i]),v.push_back(b[i]+1);
      |                      ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 4180 KB Output is correct
2 Correct 6 ms 4268 KB Output is correct
3 Correct 6 ms 4180 KB Output is correct
4 Correct 6 ms 4180 KB Output is correct
5 Correct 5 ms 4180 KB Output is correct
6 Correct 5 ms 4180 KB Output is correct
7 Correct 6 ms 4180 KB Output is correct
8 Correct 6 ms 4180 KB Output is correct
9 Correct 5 ms 4180 KB Output is correct
10 Correct 5 ms 4180 KB Output is correct
11 Correct 6 ms 4220 KB Output is correct
12 Correct 6 ms 4180 KB Output is correct
13 Correct 6 ms 4180 KB Output is correct
14 Correct 6 ms 4228 KB Output is correct
15 Correct 5 ms 4180 KB Output is correct
16 Correct 2 ms 3028 KB Output is correct
17 Correct 3 ms 3028 KB Output is correct
18 Correct 2 ms 3028 KB Output is correct
19 Correct 2 ms 3028 KB Output is correct
20 Correct 2 ms 3028 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 4180 KB Output is correct
2 Correct 6 ms 4268 KB Output is correct
3 Correct 6 ms 4180 KB Output is correct
4 Correct 6 ms 4180 KB Output is correct
5 Correct 5 ms 4180 KB Output is correct
6 Correct 5 ms 4180 KB Output is correct
7 Correct 6 ms 4180 KB Output is correct
8 Correct 6 ms 4180 KB Output is correct
9 Correct 5 ms 4180 KB Output is correct
10 Correct 5 ms 4180 KB Output is correct
11 Correct 6 ms 4220 KB Output is correct
12 Correct 6 ms 4180 KB Output is correct
13 Correct 6 ms 4180 KB Output is correct
14 Correct 6 ms 4228 KB Output is correct
15 Correct 5 ms 4180 KB Output is correct
16 Correct 2 ms 3028 KB Output is correct
17 Correct 3 ms 3028 KB Output is correct
18 Correct 2 ms 3028 KB Output is correct
19 Correct 2 ms 3028 KB Output is correct
20 Correct 2 ms 3028 KB Output is correct
21 Correct 283 ms 4256 KB Output is correct
22 Correct 270 ms 4172 KB Output is correct
23 Correct 233 ms 4232 KB Output is correct
24 Correct 283 ms 4180 KB Output is correct
25 Correct 277 ms 4172 KB Output is correct
26 Correct 582 ms 4340 KB Output is correct
27 Correct 590 ms 4220 KB Output is correct
28 Correct 623 ms 4172 KB Output is correct
29 Correct 622 ms 4424 KB Output is correct
30 Correct 7 ms 4284 KB Output is correct
31 Correct 7 ms 4284 KB Output is correct
32 Correct 6 ms 4180 KB Output is correct
33 Correct 7 ms 4280 KB Output is correct
34 Correct 6 ms 4288 KB Output is correct
35 Correct 6 ms 4180 KB Output is correct
36 Correct 6 ms 4296 KB Output is correct
37 Correct 6 ms 4308 KB Output is correct
38 Correct 6 ms 4308 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 812 KB Output is correct
2 Correct 3 ms 852 KB Output is correct
3 Correct 4 ms 852 KB Output is correct
4 Correct 5 ms 852 KB Output is correct
5 Correct 5 ms 852 KB Output is correct
6 Correct 11 ms 828 KB Output is correct
7 Correct 11 ms 852 KB Output is correct
8 Correct 11 ms 852 KB Output is correct
9 Correct 10 ms 864 KB Output is correct
10 Correct 10 ms 852 KB Output is correct
11 Correct 5 ms 852 KB Output is correct
12 Correct 4 ms 852 KB Output is correct
13 Correct 4 ms 852 KB Output is correct
14 Correct 5 ms 852 KB Output is correct
15 Correct 5 ms 852 KB Output is correct
16 Correct 2 ms 724 KB Output is correct
17 Correct 2 ms 820 KB Output is correct
18 Correct 3 ms 724 KB Output is correct
19 Correct 3 ms 724 KB Output is correct
20 Correct 4 ms 816 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 4180 KB Output is correct
2 Correct 6 ms 4268 KB Output is correct
3 Correct 6 ms 4180 KB Output is correct
4 Correct 6 ms 4180 KB Output is correct
5 Correct 5 ms 4180 KB Output is correct
6 Correct 5 ms 4180 KB Output is correct
7 Correct 6 ms 4180 KB Output is correct
8 Correct 6 ms 4180 KB Output is correct
9 Correct 5 ms 4180 KB Output is correct
10 Correct 5 ms 4180 KB Output is correct
11 Correct 6 ms 4220 KB Output is correct
12 Correct 6 ms 4180 KB Output is correct
13 Correct 6 ms 4180 KB Output is correct
14 Correct 6 ms 4228 KB Output is correct
15 Correct 5 ms 4180 KB Output is correct
16 Correct 2 ms 3028 KB Output is correct
17 Correct 3 ms 3028 KB Output is correct
18 Correct 2 ms 3028 KB Output is correct
19 Correct 2 ms 3028 KB Output is correct
20 Correct 2 ms 3028 KB Output is correct
21 Correct 283 ms 4256 KB Output is correct
22 Correct 270 ms 4172 KB Output is correct
23 Correct 233 ms 4232 KB Output is correct
24 Correct 283 ms 4180 KB Output is correct
25 Correct 277 ms 4172 KB Output is correct
26 Correct 582 ms 4340 KB Output is correct
27 Correct 590 ms 4220 KB Output is correct
28 Correct 623 ms 4172 KB Output is correct
29 Correct 622 ms 4424 KB Output is correct
30 Correct 7 ms 4284 KB Output is correct
31 Correct 7 ms 4284 KB Output is correct
32 Correct 6 ms 4180 KB Output is correct
33 Correct 7 ms 4280 KB Output is correct
34 Correct 6 ms 4288 KB Output is correct
35 Correct 6 ms 4180 KB Output is correct
36 Correct 6 ms 4296 KB Output is correct
37 Correct 6 ms 4308 KB Output is correct
38 Correct 6 ms 4308 KB Output is correct
39 Correct 5 ms 812 KB Output is correct
40 Correct 3 ms 852 KB Output is correct
41 Correct 4 ms 852 KB Output is correct
42 Correct 5 ms 852 KB Output is correct
43 Correct 5 ms 852 KB Output is correct
44 Correct 11 ms 828 KB Output is correct
45 Correct 11 ms 852 KB Output is correct
46 Correct 11 ms 852 KB Output is correct
47 Correct 10 ms 864 KB Output is correct
48 Correct 10 ms 852 KB Output is correct
49 Correct 5 ms 852 KB Output is correct
50 Correct 4 ms 852 KB Output is correct
51 Correct 4 ms 852 KB Output is correct
52 Correct 5 ms 852 KB Output is correct
53 Correct 5 ms 852 KB Output is correct
54 Correct 2 ms 724 KB Output is correct
55 Correct 2 ms 820 KB Output is correct
56 Correct 3 ms 724 KB Output is correct
57 Correct 3 ms 724 KB Output is correct
58 Correct 4 ms 816 KB Output is correct
59 Correct 478 ms 4240 KB Output is correct
60 Correct 464 ms 4212 KB Output is correct
61 Correct 440 ms 4200 KB Output is correct
62 Correct 507 ms 4248 KB Output is correct
63 Correct 482 ms 4300 KB Output is correct
64 Correct 1206 ms 4196 KB Output is correct
65 Correct 1210 ms 4268 KB Output is correct
66 Correct 1169 ms 4244 KB Output is correct
67 Correct 1137 ms 4204 KB Output is correct
68 Correct 1160 ms 4312 KB Output is correct
69 Correct 417 ms 4212 KB Output is correct
70 Correct 415 ms 4284 KB Output is correct
71 Correct 419 ms 4196 KB Output is correct
72 Correct 451 ms 4452 KB Output is correct
73 Correct 440 ms 4268 KB Output is correct
74 Correct 52 ms 2968 KB Output is correct
75 Correct 49 ms 2952 KB Output is correct
76 Correct 49 ms 2976 KB Output is correct
77 Correct 49 ms 3024 KB Output is correct
78 Correct 51 ms 2992 KB Output is correct