oj.uz

Submission #108417

# Submission time Handle Problem Language Result Execution time Memory
108417 2019-04-29T06:54:42 Z nxteru Boat (APIO16_boat) C++14
100 / 100
 762 ms 12492 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define M 1000000007
#define PB push_back
ll n,a[505],b[505],dp[1005][505],s[1005][505],f[505],ans,r[1005][505],l[505];
vector<ll>cm;
int main(void){
    scanf("%lld",&n);
    f[1]=1;
    for(int i=2;i<n;i++)f[i]=M-(M/i)*f[M%i]%M;
    for(int i=0;i<n;i++){
		scanf("%lld%lld",a+i,b+i);
		a[i]--;
		cm.PB(a[i]);
		cm.PB(b[i]);
	}
	sort(cm.begin(),cm.end());
	cm.erase(unique(cm.begin(),cm.end()),cm.end());
	for(int i=0;i<n;i++){
		a[i]=lower_bound(cm.begin(),cm.end(),a[i])-cm.begin();
		b[i]=lower_bound(cm.begin(),cm.end(),b[i])-cm.begin();
	}
	for(int i=n-1;i>=0;i--){
		for(int j=1;j<cm.size();j++){
			if(a[i]<j&&j<=b[i])r[j][i]++;
			r[j][i]+=r[j][i+1];
		}
	}
	for(int i=1;i<cm.size();i++){
		ll p=cm[i]-cm[i-1];
		s[i][0]=1;
		for(ll j=1;j<n;j++){
			s[i][j]=s[i][j-1]*(p+j-1LL)%M*f[j]%M;
		}
	}
	for(int i=0;i<n;i++){
		ll p=1;
		for(int j=1;j<=b[i];j++){
			ll *x=r[j],*y=dp[j],*z=s[j];
			if(j>a[i]){
				y[i]=p;
				ans=(ans+p*z[x[i]]%M)%M;
			}
			for(int k=0;k<i;k++)p=(p+y[k]*z[x[k]-x[i]]%M)%M;
		}
	}
	printf("%lld\n",ans);
}

Compilation message

boat.cpp: In function 'int main()':
boat.cpp:25:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int j=1;j<cm.size();j++){
               ~^~~~~~~~~~
boat.cpp:30:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=1;i<cm.size();i++){
              ~^~~~~~~~~~
boat.cpp:9:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld",&n);
     ~~~~~^~~~~~~~~~~
boat.cpp:13:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld%lld",a+i,b+i);
   ~~~~~^~~~~~~~~~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 402 ms 10356 KB Output is correct
2 Correct 416 ms 10360 KB Output is correct
3 Correct 423 ms 10216 KB Output is correct
4 Correct 400 ms 10400 KB Output is correct
5 Correct 416 ms 10388 KB Output is correct
6 Correct 520 ms 10312 KB Output is correct
7 Correct 509 ms 10304 KB Output is correct
8 Correct 523 ms 10232 KB Output is correct
9 Correct 582 ms 10368 KB Output is correct
10 Correct 476 ms 10292 KB Output is correct
11 Correct 455 ms 10276 KB Output is correct
12 Correct 484 ms 10232 KB Output is correct
13 Correct 552 ms 10348 KB Output is correct
14 Correct 498 ms 10432 KB Output is correct
15 Correct 456 ms 10520 KB Output is correct
16 Correct 47 ms 2304 KB Output is correct
17 Correct 50 ms 2532 KB Output is correct
18 Correct 47 ms 2424 KB Output is correct
19 Correct 46 ms 2432 KB Output is correct
20 Correct 50 ms 2424 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 402 ms 10356 KB Output is correct
2 Correct 416 ms 10360 KB Output is correct
3 Correct 423 ms 10216 KB Output is correct
4 Correct 400 ms 10400 KB Output is correct
5 Correct 416 ms 10388 KB Output is correct
6 Correct 520 ms 10312 KB Output is correct
7 Correct 509 ms 10304 KB Output is correct
8 Correct 523 ms 10232 KB Output is correct
9 Correct 582 ms 10368 KB Output is correct
10 Correct 476 ms 10292 KB Output is correct
11 Correct 455 ms 10276 KB Output is correct
12 Correct 484 ms 10232 KB Output is correct
13 Correct 552 ms 10348 KB Output is correct
14 Correct 498 ms 10432 KB Output is correct
15 Correct 456 ms 10520 KB Output is correct
16 Correct 47 ms 2304 KB Output is correct
17 Correct 50 ms 2532 KB Output is correct
18 Correct 47 ms 2424 KB Output is correct
19 Correct 46 ms 2432 KB Output is correct
20 Correct 50 ms 2424 KB Output is correct
21 Correct 562 ms 11444 KB Output is correct
22 Correct 551 ms 11368 KB Output is correct
23 Correct 546 ms 11256 KB Output is correct
24 Correct 520 ms 11128 KB Output is correct
25 Correct 473 ms 11008 KB Output is correct
26 Correct 645 ms 10872 KB Output is correct
27 Correct 679 ms 10976 KB Output is correct
28 Correct 605 ms 10840 KB Output is correct
29 Correct 556 ms 10872 KB Output is correct
30 Correct 491 ms 12104 KB Output is correct
31 Correct 567 ms 12384 KB Output is correct
32 Correct 553 ms 12408 KB Output is correct
33 Correct 583 ms 12300 KB Output is correct
34 Correct 550 ms 12252 KB Output is correct
35 Correct 404 ms 12212 KB Output is correct
36 Correct 389 ms 12156 KB Output is correct
37 Correct 442 ms 12160 KB Output is correct
38 Correct 446 ms 12280 KB Output is correct

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 2688 KB Output is correct
2 Correct 8 ms 2688 KB Output is correct
3 Correct 8 ms 2688 KB Output is correct
4 Correct 8 ms 2688 KB Output is correct
5 Correct 8 ms 2688 KB Output is correct
6 Correct 9 ms 2688 KB Output is correct
7 Correct 10 ms 2688 KB Output is correct
8 Correct 9 ms 2688 KB Output is correct
9 Correct 6 ms 2688 KB Output is correct
10 Correct 9 ms 2688 KB Output is correct
11 Correct 8 ms 2688 KB Output is correct
12 Correct 10 ms 2688 KB Output is correct
13 Correct 9 ms 2688 KB Output is correct
14 Correct 9 ms 2688 KB Output is correct
15 Correct 9 ms 2688 KB Output is correct
16 Correct 7 ms 1664 KB Output is correct
17 Correct 6 ms 1664 KB Output is correct
18 Correct 6 ms 1664 KB Output is correct
19 Correct 7 ms 1664 KB Output is correct
20 Correct 6 ms 1664 KB Output is correct

Subtask #4
42.0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 402 ms 10356 KB Output is correct
2 Correct 416 ms 10360 KB Output is correct
3 Correct 423 ms 10216 KB Output is correct
4 Correct 400 ms 10400 KB Output is correct
5 Correct 416 ms 10388 KB Output is correct
6 Correct 520 ms 10312 KB Output is correct
7 Correct 509 ms 10304 KB Output is correct
8 Correct 523 ms 10232 KB Output is correct
9 Correct 582 ms 10368 KB Output is correct
10 Correct 476 ms 10292 KB Output is correct
11 Correct 455 ms 10276 KB Output is correct
12 Correct 484 ms 10232 KB Output is correct
13 Correct 552 ms 10348 KB Output is correct
14 Correct 498 ms 10432 KB Output is correct
15 Correct 456 ms 10520 KB Output is correct
16 Correct 47 ms 2304 KB Output is correct
17 Correct 50 ms 2532 KB Output is correct
18 Correct 47 ms 2424 KB Output is correct
19 Correct 46 ms 2432 KB Output is correct
20 Correct 50 ms 2424 KB Output is correct
21 Correct 562 ms 11444 KB Output is correct
22 Correct 551 ms 11368 KB Output is correct
23 Correct 546 ms 11256 KB Output is correct
24 Correct 520 ms 11128 KB Output is correct
25 Correct 473 ms 11008 KB Output is correct
26 Correct 645 ms 10872 KB Output is correct
27 Correct 679 ms 10976 KB Output is correct
28 Correct 605 ms 10840 KB Output is correct
29 Correct 556 ms 10872 KB Output is correct
30 Correct 491 ms 12104 KB Output is correct
31 Correct 567 ms 12384 KB Output is correct
32 Correct 553 ms 12408 KB Output is correct
33 Correct 583 ms 12300 KB Output is correct
34 Correct 550 ms 12252 KB Output is correct
35 Correct 404 ms 12212 KB Output is correct
36 Correct 389 ms 12156 KB Output is correct
37 Correct 442 ms 12160 KB Output is correct
38 Correct 446 ms 12280 KB Output is correct
39 Correct 8 ms 2688 KB Output is correct
40 Correct 8 ms 2688 KB Output is correct
41 Correct 8 ms 2688 KB Output is correct
42 Correct 8 ms 2688 KB Output is correct
43 Correct 8 ms 2688 KB Output is correct
44 Correct 9 ms 2688 KB Output is correct
45 Correct 10 ms 2688 KB Output is correct
46 Correct 9 ms 2688 KB Output is correct
47 Correct 6 ms 2688 KB Output is correct
48 Correct 9 ms 2688 KB Output is correct
49 Correct 8 ms 2688 KB Output is correct
50 Correct 10 ms 2688 KB Output is correct
51 Correct 9 ms 2688 KB Output is correct
52 Correct 9 ms 2688 KB Output is correct
53 Correct 9 ms 2688 KB Output is correct
54 Correct 7 ms 1664 KB Output is correct
55 Correct 6 ms 1664 KB Output is correct
56 Correct 6 ms 1664 KB Output is correct
57 Correct 7 ms 1664 KB Output is correct
58 Correct 6 ms 1664 KB Output is correct
59 Correct 595 ms 12492 KB Output is correct
60 Correct 626 ms 12280 KB Output is correct
61 Correct 589 ms 12152 KB Output is correct
62 Correct 643 ms 12280 KB Output is correct
63 Correct 572 ms 12316 KB Output is correct
64 Correct 762 ms 12280 KB Output is correct
65 Correct 734 ms 12232 KB Output is correct
66 Correct 638 ms 12248 KB Output is correct
67 Correct 735 ms 12280 KB Output is correct
68 Correct 631 ms 12252 KB Output is correct
69 Correct 614 ms 12408 KB Output is correct
70 Correct 655 ms 12160 KB Output is correct
71 Correct 686 ms 12280 KB Output is correct
72 Correct 652 ms 12244 KB Output is correct
73 Correct 689 ms 12260 KB Output is correct
74 Correct 90 ms 2432 KB Output is correct
75 Correct 97 ms 2604 KB Output is correct
76 Correct 106 ms 2592 KB Output is correct
77 Correct 86 ms 2680 KB Output is correct
78 Correct 90 ms 2548 KB Output is correct