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Submission #349289

# Submission time Handle Problem Language Result Execution time Memory
349289 2021-01-17T10:45:09 Z denkendoemeer Boat (APIO16_boat) C++14
100 / 100
 1451 ms 4480 KB 
#include<bits/stdc++.h>
#define ll long long
using namespace std;
#define mod 1000000007
vector<int>aux;
array<int,2>v[505];
ll dp[1005][505],inv[505];
int main()
{
    //freopen(".in","r",stdin);
    //freopen(".out","w",stdout);
    int n,i,j,e;
    scanf("%d",&n);
    aux={-1};
    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("%d%d",&v[i][0],&v[i][1]);
        ++v[i][1];
        aux.push_back(v[i][0]);
        aux.push_back(v[i][1]);
    }
    sort(aux.begin(),aux.end());
    aux.resize(unique(aux.begin(),aux.end())-aux.begin());
    int m=aux.size();
    for(i=0;i<m;i++)
        dp[i][0]=1;
    for(i=1;i<=n;i++){
        for(j=m-1;j>=1;j--)
            if (v[i][0]<=aux[j-1] && aux[j]<=v[i][1]){
                int cnt=aux[j]-aux[j-1];
                for(e=min(cnt,i);e>=1;e--)
                    dp[j][e]=(dp[j][e]+dp[j][e-1]*(cnt-e+1)%mod*inv[e])%mod;
            }
        for(j=1;j<=m;j++){
            dp[j][0]=0;
            for(e=0;e<=n;e++)
                dp[j][0]=(dp[j][0]+dp[j-1][e])%mod;
        }
    }
    printf("%lld\n",(dp[m][0]+mod-1)%mod);
return 0;
}

Compilation message

boat.cpp: In function 'int main()':
boat.cpp:13:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   13 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
boat.cpp:19:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   19 |         scanf("%d%d",&v[i][0],&v[i][1]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1149 ms 4356 KB Output is correct
2 Correct 1153 ms 4332 KB Output is correct
3 Correct 1153 ms 4352 KB Output is correct
4 Correct 1154 ms 4356 KB Output is correct
5 Correct 1152 ms 4460 KB Output is correct
6 Correct 1151 ms 4460 KB Output is correct
7 Correct 1161 ms 4356 KB Output is correct
8 Correct 1164 ms 4480 KB Output is correct
9 Correct 1190 ms 4460 KB Output is correct
10 Correct 1153 ms 4352 KB Output is correct
11 Correct 1148 ms 4460 KB Output is correct
12 Correct 1153 ms 4460 KB Output is correct
13 Correct 1157 ms 4460 KB Output is correct
14 Correct 1170 ms 4356 KB Output is correct
15 Correct 1157 ms 4332 KB Output is correct
16 Correct 208 ms 1004 KB Output is correct
17 Correct 220 ms 1260 KB Output is correct
18 Correct 211 ms 1132 KB Output is correct
19 Correct 220 ms 1132 KB Output is correct
20 Correct 212 ms 1132 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1149 ms 4356 KB Output is correct
2 Correct 1153 ms 4332 KB Output is correct
3 Correct 1153 ms 4352 KB Output is correct
4 Correct 1154 ms 4356 KB Output is correct
5 Correct 1152 ms 4460 KB Output is correct
6 Correct 1151 ms 4460 KB Output is correct
7 Correct 1161 ms 4356 KB Output is correct
8 Correct 1164 ms 4480 KB Output is correct
9 Correct 1190 ms 4460 KB Output is correct
10 Correct 1153 ms 4352 KB Output is correct
11 Correct 1148 ms 4460 KB Output is correct
12 Correct 1153 ms 4460 KB Output is correct
13 Correct 1157 ms 4460 KB Output is correct
14 Correct 1170 ms 4356 KB Output is correct
15 Correct 1157 ms 4332 KB Output is correct
16 Correct 208 ms 1004 KB Output is correct
17 Correct 220 ms 1260 KB Output is correct
18 Correct 211 ms 1132 KB Output is correct
19 Correct 220 ms 1132 KB Output is correct
20 Correct 212 ms 1132 KB Output is correct
21 Correct 1059 ms 3948 KB Output is correct
22 Correct 1073 ms 4076 KB Output is correct
23 Correct 1045 ms 4076 KB Output is correct
24 Correct 1042 ms 4076 KB Output is correct
25 Correct 1045 ms 3948 KB Output is correct
26 Correct 1022 ms 3948 KB Output is correct
27 Correct 1039 ms 3948 KB Output is correct
28 Correct 1022 ms 3948 KB Output is correct
29 Correct 1020 ms 3948 KB Output is correct
30 Correct 1148 ms 4460 KB Output is correct
31 Correct 1151 ms 4460 KB Output is correct
32 Correct 1145 ms 4460 KB Output is correct
33 Correct 1159 ms 4460 KB Output is correct
34 Correct 1143 ms 4460 KB Output is correct
35 Correct 1148 ms 4344 KB Output is correct
36 Correct 1145 ms 4460 KB Output is correct
37 Correct 1143 ms 4460 KB Output is correct
38 Correct 1148 ms 4460 KB Output is correct

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 1132 KB Output is correct
2 Correct 12 ms 1132 KB Output is correct
3 Correct 12 ms 1132 KB Output is correct
4 Correct 12 ms 1132 KB Output is correct
5 Correct 12 ms 1132 KB Output is correct
6 Correct 13 ms 1132 KB Output is correct
7 Correct 14 ms 1260 KB Output is correct
8 Correct 13 ms 1132 KB Output is correct
9 Correct 13 ms 1132 KB Output is correct
10 Correct 13 ms 1132 KB Output is correct
11 Correct 13 ms 1132 KB Output is correct
12 Correct 13 ms 1132 KB Output is correct
13 Correct 12 ms 1132 KB Output is correct
14 Correct 12 ms 1132 KB Output is correct
15 Correct 12 ms 1132 KB Output is correct
16 Correct 7 ms 748 KB Output is correct
17 Correct 7 ms 748 KB Output is correct
18 Correct 7 ms 748 KB Output is correct
19 Correct 7 ms 748 KB Output is correct
20 Correct 7 ms 748 KB Output is correct

Subtask #4
42.0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 1149 ms 4356 KB Output is correct
2 Correct 1153 ms 4332 KB Output is correct
3 Correct 1153 ms 4352 KB Output is correct
4 Correct 1154 ms 4356 KB Output is correct
5 Correct 1152 ms 4460 KB Output is correct
6 Correct 1151 ms 4460 KB Output is correct
7 Correct 1161 ms 4356 KB Output is correct
8 Correct 1164 ms 4480 KB Output is correct
9 Correct 1190 ms 4460 KB Output is correct
10 Correct 1153 ms 4352 KB Output is correct
11 Correct 1148 ms 4460 KB Output is correct
12 Correct 1153 ms 4460 KB Output is correct
13 Correct 1157 ms 4460 KB Output is correct
14 Correct 1170 ms 4356 KB Output is correct
15 Correct 1157 ms 4332 KB Output is correct
16 Correct 208 ms 1004 KB Output is correct
17 Correct 220 ms 1260 KB Output is correct
18 Correct 211 ms 1132 KB Output is correct
19 Correct 220 ms 1132 KB Output is correct
20 Correct 212 ms 1132 KB Output is correct
21 Correct 1059 ms 3948 KB Output is correct
22 Correct 1073 ms 4076 KB Output is correct
23 Correct 1045 ms 4076 KB Output is correct
24 Correct 1042 ms 4076 KB Output is correct
25 Correct 1045 ms 3948 KB Output is correct
26 Correct 1022 ms 3948 KB Output is correct
27 Correct 1039 ms 3948 KB Output is correct
28 Correct 1022 ms 3948 KB Output is correct
29 Correct 1020 ms 3948 KB Output is correct
30 Correct 1148 ms 4460 KB Output is correct
31 Correct 1151 ms 4460 KB Output is correct
32 Correct 1145 ms 4460 KB Output is correct
33 Correct 1159 ms 4460 KB Output is correct
34 Correct 1143 ms 4460 KB Output is correct
35 Correct 1148 ms 4344 KB Output is correct
36 Correct 1145 ms 4460 KB Output is correct
37 Correct 1143 ms 4460 KB Output is correct
38 Correct 1148 ms 4460 KB Output is correct
39 Correct 12 ms 1132 KB Output is correct
40 Correct 12 ms 1132 KB Output is correct
41 Correct 12 ms 1132 KB Output is correct
42 Correct 12 ms 1132 KB Output is correct
43 Correct 12 ms 1132 KB Output is correct
44 Correct 13 ms 1132 KB Output is correct
45 Correct 14 ms 1260 KB Output is correct
46 Correct 13 ms 1132 KB Output is correct
47 Correct 13 ms 1132 KB Output is correct
48 Correct 13 ms 1132 KB Output is correct
49 Correct 13 ms 1132 KB Output is correct
50 Correct 13 ms 1132 KB Output is correct
51 Correct 12 ms 1132 KB Output is correct
52 Correct 12 ms 1132 KB Output is correct
53 Correct 12 ms 1132 KB Output is correct
54 Correct 7 ms 748 KB Output is correct
55 Correct 7 ms 748 KB Output is correct
56 Correct 7 ms 748 KB Output is correct
57 Correct 7 ms 748 KB Output is correct
58 Correct 7 ms 748 KB Output is correct
59 Correct 1358 ms 4356 KB Output is correct
60 Correct 1350 ms 4460 KB Output is correct
61 Correct 1335 ms 4460 KB Output is correct
62 Correct 1354 ms 4460 KB Output is correct
63 Correct 1351 ms 4356 KB Output is correct
64 Correct 1442 ms 4460 KB Output is correct
65 Correct 1449 ms 4460 KB Output is correct
66 Correct 1451 ms 4460 KB Output is correct
67 Correct 1447 ms 4460 KB Output is correct
68 Correct 1444 ms 4332 KB Output is correct
69 Correct 1301 ms 4356 KB Output is correct
70 Correct 1298 ms 4460 KB Output is correct
71 Correct 1308 ms 4460 KB Output is correct
72 Correct 1322 ms 4332 KB Output is correct
73 Correct 1328 ms 4460 KB Output is correct
74 Correct 230 ms 1132 KB Output is correct
75 Correct 236 ms 1260 KB Output is correct
76 Correct 232 ms 1132 KB Output is correct
77 Correct 230 ms 1132 KB Output is correct
78 Correct 230 ms 1132 KB Output is correct