oj.uz

Submission #25545

# Submission time Handle Problem Language Result Execution time Memory
25545 2017-06-23T02:58:23 Z kajebiii Boat (APIO16_boat) C++14
9 / 100
 6 ms 4064 KB 
#include <bits/stdc++.h>

using namespace std;

#define REP(i,n) for(int (i)=0;(i)<(int)(n);(i)++)
#define REPO(i,n) for(int (i)=1; (i)<=(int)(n); (i)++)
#define SZ(v) ((int)(v).size())
#define ALL(v) (v).begin(),(v).end()
#define one first
#define two second
typedef long long ll;
typedef pair<int, int> pi;
const int INF = 0x3f2f1f0f;
const ll LINF = 1ll * INF * INF;

const int MAX_N = 5e2 + 10, MAX_C = MAX_N * 2, MOD = 1e9 + 7;

int N, Nr[MAX_N][2], Dy[MAX_N][MAX_C], Sum[MAX_C];
vector<int> Co;
int main() {
	cin >> N; 
	REPO(i, N) REP(j, 2) scanf("%d", &Nr[i][j]), Nr[i][j] += j, Co.push_back(Nr[i][j]);
	Co.push_back(0);
	sort(ALL(Co)); Co.erase(unique(ALL(Co)), Co.end());
	REPO(i, N) REP(j, 2) Nr[i][j] = lower_bound(ALL(Co), Nr[i][j]) - Co.begin();

	int cN = SZ(Co);
	Dy[0][0] = 1;
	REPO(i, N) {
		for(int j=0; j+1<cN; j++) {
			if(j) Sum[j] = Sum[j-1]; else Sum[j] = 0;
			Sum[j] = (Sum[j] + Dy[i-1][j]) % MOD;
		}
		for(int j=0; j<cN; j++) Dy[i][j] = Dy[i-1][j];
		for(int j=Nr[i][0]; j<Nr[i][1]; j++)
			Dy[i][j] = (Dy[i][j] + 1ll * Sum[j-1] * (Co[j+1] - Co[j]) ) % MOD;
	}
	int ans = 0;
	for(int j=0; j<cN; j++) ans = (ans + Dy[N][j]) % MOD;
	ans = (ans + MOD - 1) % MOD;
	printf("%d\n", ans);
	return 0;
}

Compilation message

boat.cpp: In function 'int main()':
boat.cpp:22:84: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  REPO(i, N) REP(j, 2) scanf("%d", &Nr[i][j]), Nr[i][j] += j, Co.push_back(Nr[i][j]);
                                                                                    ^

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 4064 KB Output is correct
2 Correct 3 ms 4064 KB Output is correct
3 Correct 3 ms 4064 KB Output is correct
4 Correct 3 ms 4064 KB Output is correct
5 Correct 6 ms 4064 KB Output is correct
6 Correct 3 ms 4064 KB Output is correct
7 Correct 3 ms 4064 KB Output is correct
8 Correct 6 ms 4064 KB Output is correct
9 Correct 3 ms 4064 KB Output is correct
10 Correct 3 ms 4064 KB Output is correct
11 Correct 3 ms 4064 KB Output is correct
12 Correct 3 ms 4064 KB Output is correct
13 Correct 3 ms 4064 KB Output is correct
14 Correct 3 ms 4064 KB Output is correct
15 Correct 3 ms 4064 KB Output is correct
16 Correct 0 ms 4064 KB Output is correct
17 Correct 0 ms 4064 KB Output is correct
18 Correct 0 ms 4064 KB Output is correct
19 Correct 0 ms 4064 KB Output is correct
20 Correct 0 ms 4064 KB Output is correct

Subtask #2
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 4064 KB Output is correct
2 Correct 3 ms 4064 KB Output is correct
3 Correct 3 ms 4064 KB Output is correct
4 Correct 3 ms 4064 KB Output is correct
5 Correct 6 ms 4064 KB Output is correct
6 Correct 3 ms 4064 KB Output is correct
7 Correct 3 ms 4064 KB Output is correct
8 Correct 6 ms 4064 KB Output is correct
9 Correct 3 ms 4064 KB Output is correct
10 Correct 3 ms 4064 KB Output is correct
11 Correct 3 ms 4064 KB Output is correct
12 Correct 3 ms 4064 KB Output is correct
13 Correct 3 ms 4064 KB Output is correct
14 Correct 3 ms 4064 KB Output is correct
15 Correct 3 ms 4064 KB Output is correct
16 Correct 0 ms 4064 KB Output is correct
17 Correct 0 ms 4064 KB Output is correct
18 Correct 0 ms 4064 KB Output is correct
19 Correct 0 ms 4064 KB Output is correct
20 Correct 0 ms 4064 KB Output is correct
21 Incorrect 3 ms 4064 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 4064 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 4064 KB Output is correct
2 Correct 3 ms 4064 KB Output is correct
3 Correct 3 ms 4064 KB Output is correct
4 Correct 3 ms 4064 KB Output is correct
5 Correct 6 ms 4064 KB Output is correct
6 Correct 3 ms 4064 KB Output is correct
7 Correct 3 ms 4064 KB Output is correct
8 Correct 6 ms 4064 KB Output is correct
9 Correct 3 ms 4064 KB Output is correct
10 Correct 3 ms 4064 KB Output is correct
11 Correct 3 ms 4064 KB Output is correct
12 Correct 3 ms 4064 KB Output is correct
13 Correct 3 ms 4064 KB Output is correct
14 Correct 3 ms 4064 KB Output is correct
15 Correct 3 ms 4064 KB Output is correct
16 Correct 0 ms 4064 KB Output is correct
17 Correct 0 ms 4064 KB Output is correct
18 Correct 0 ms 4064 KB Output is correct
19 Correct 0 ms 4064 KB Output is correct
20 Correct 0 ms 4064 KB Output is correct
21 Incorrect 3 ms 4064 KB Output isn't correct
22 Halted 0 ms 0 KB -