oj.uz

Submission #45556

# Submission time Handle Problem Language Result Execution time Memory
45556 2018-04-15T11:23:54 Z gnoor Boat (APIO16_boat) C++17
9 / 100
 1189 ms 4488 KB 
#include <cstdio>
#include <algorithm>
#include <map>

using namespace std;

map<int,int> mp;
int a[600];
int b[600];
int mod=1000000007;
int dec[1010];

long long dp[600][1010];

int main () {
	int n;
	scanf("%d",&n);
	for (int i=0;i<n;i++) {
		scanf("%d%d",&a[i],&b[i]);
		mp[a[i]-1];
		mp[b[i]];
	}
	int i=1;
	for (auto &ii:mp) {
		dec[i]=ii.first;
		ii.second=i++;
	}
	for (int i=0;i<n;i++) {
		a[i]=mp[a[i]-1];
		b[i]=mp[b[i]];
	}
	int nn=mp.size();

	for (int i=0;i<n;i++) {
		//printf("** %d %d\n",a[i],b[i]);
		for (int j=i-1;j>=0;j--) {
			for (int k=a[i]+1;k<=b[i];k++) {
				//printf("** %d %d %d %lld\n",i,j,k,dp[j][k-1]);
				dp[i][k]+=dp[j][k-1]*(dec[k]-dec[k-1]);
				dp[i][k]%=mod;
				if (k>a[j]&&k<=b[j]) {
					dp[i][k]+=(long long)(dec[k]-dec[k-1])*(dec[k]-dec[k-1]-1)/2;
				}
				dp[i][k]%=mod;
			}
		}
		for (int k=a[i]+1;k<=b[i];k++) {
			dp[i][k]+=(dec[k]-dec[k-1]);
			dp[i][k]+=dp[i][k-1];
			dp[i][k]%=mod;
		}
		for (int k=b[i]+1;k<=nn;k++) {
			dp[i][k]+=dp[i][k-1];
			dp[i][k]%=mod;
		}
		//for (int k=1;k<=nn;k++) {
			//printf("%lld ",dp[i][k]);
		//}
		//printf("\n");
	}
	long long ans=0;
	for (int i=0;i<n;i++) {
		ans+=dp[i][nn];
		ans%=mod;
	}
	printf("%lld\n",ans);
	return 0;
}

Compilation message

boat.cpp: In function 'int main()':
boat.cpp:17:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
  ~~~~~^~~~~~~~~
boat.cpp:19:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&a[i],&b[i]);
   ~~~~~^~~~~~~~~~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 3832 KB Output is correct
2 Correct 19 ms 3832 KB Output is correct
3 Correct 18 ms 3864 KB Output is correct
4 Correct 18 ms 3864 KB Output is correct
5 Correct 19 ms 3864 KB Output is correct
6 Correct 17 ms 3868 KB Output is correct
7 Correct 17 ms 3916 KB Output is correct
8 Correct 18 ms 3916 KB Output is correct
9 Correct 17 ms 3968 KB Output is correct
10 Correct 20 ms 4020 KB Output is correct
11 Correct 17 ms 4020 KB Output is correct
12 Correct 18 ms 4020 KB Output is correct
13 Correct 18 ms 4020 KB Output is correct
14 Correct 17 ms 4020 KB Output is correct
15 Correct 17 ms 4020 KB Output is correct
16 Correct 11 ms 4020 KB Output is correct
17 Correct 11 ms 4020 KB Output is correct
18 Correct 11 ms 4020 KB Output is correct
19 Correct 12 ms 4020 KB Output is correct
20 Correct 12 ms 4020 KB Output is correct

Subtask #2
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 3832 KB Output is correct
2 Correct 19 ms 3832 KB Output is correct
3 Correct 18 ms 3864 KB Output is correct
4 Correct 18 ms 3864 KB Output is correct
5 Correct 19 ms 3864 KB Output is correct
6 Correct 17 ms 3868 KB Output is correct
7 Correct 17 ms 3916 KB Output is correct
8 Correct 18 ms 3916 KB Output is correct
9 Correct 17 ms 3968 KB Output is correct
10 Correct 20 ms 4020 KB Output is correct
11 Correct 17 ms 4020 KB Output is correct
12 Correct 18 ms 4020 KB Output is correct
13 Correct 18 ms 4020 KB Output is correct
14 Correct 17 ms 4020 KB Output is correct
15 Correct 17 ms 4020 KB Output is correct
16 Correct 11 ms 4020 KB Output is correct
17 Correct 11 ms 4020 KB Output is correct
18 Correct 11 ms 4020 KB Output is correct
19 Correct 12 ms 4020 KB Output is correct
20 Correct 12 ms 4020 KB Output is correct
21 Incorrect 1189 ms 4488 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Incorrect 11 ms 4488 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 3832 KB Output is correct
2 Correct 19 ms 3832 KB Output is correct
3 Correct 18 ms 3864 KB Output is correct
4 Correct 18 ms 3864 KB Output is correct
5 Correct 19 ms 3864 KB Output is correct
6 Correct 17 ms 3868 KB Output is correct
7 Correct 17 ms 3916 KB Output is correct
8 Correct 18 ms 3916 KB Output is correct
9 Correct 17 ms 3968 KB Output is correct
10 Correct 20 ms 4020 KB Output is correct
11 Correct 17 ms 4020 KB Output is correct
12 Correct 18 ms 4020 KB Output is correct
13 Correct 18 ms 4020 KB Output is correct
14 Correct 17 ms 4020 KB Output is correct
15 Correct 17 ms 4020 KB Output is correct
16 Correct 11 ms 4020 KB Output is correct
17 Correct 11 ms 4020 KB Output is correct
18 Correct 11 ms 4020 KB Output is correct
19 Correct 12 ms 4020 KB Output is correct
20 Correct 12 ms 4020 KB Output is correct
21 Incorrect 1189 ms 4488 KB Output isn't correct
22 Halted 0 ms 0 KB -