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Submission #52442

# Submission time Handle Problem Language Result Execution time Memory
52442 2018-06-26T03:02:09 Z shoemakerjo Gondola (IOI14_gondola) C++14
45 / 100
 97 ms 5232 KB 
#include <bits/stdc++.h>
#include "gondola.h"
using namespace std;
#define ll long long
#define pii pair<int, int>
const int mod = 1000000009;

int modpow(int base, int p) {
	if (p == 0) return 1;
	if (p & 1) {
		int tmp = modpow(base, p-1);
		return (tmp*1LL*base)%mod;
	}
	int tmp = modpow(base, p/2);
	return (tmp*1LL*tmp)%mod;
}

int valid(int n, int inputSeq[])
{
	int minval = n+1;
	int minind = 0;
	set<int> seen;
	for (int i = 0; i < n; i++) {
		if (inputSeq[i] < minval) {
			minval = inputSeq[i];
			minind = i;
		}
		if (seen.count(inputSeq[i]) > 0) return 0;
		seen.insert(inputSeq[i]);
	}
	if (minval > n) return 1; //i think this is fine then

	int cur = minind;
	int ivals[n];
	int cv = minval;
	//cannot appear after something that is greater than me and still less than n
	int maxv = -1;
	for (int i = 0; i < n; i++) {
		ivals[cur] = cv;
		cur = (cur+1)%n;
		cv = (cv+1)%n;
		if (cv == 0) cv += n;
	}
	for (int i = 0; i < n; i++) {
		if (inputSeq[i] <= n && inputSeq[i] != ivals[i]) {
			return 0;
		}
	}
	return 1; //nothing was bad enough to return 0
}

//----------------------

int replacement(int n, int gondolaSeq[], int replacementSeq[])
{	
	//find a valid replacement sequence

	int sz = 0; //get what becomes what

	int lowbelow = -1;
	int lowind = -1;
	int maxval = -1;
	map<int, int> ch;
	int maxind = -1;
	int cvals[n];
	for (int i = 0; i < n; i++) {
		cvals[i] = gondolaSeq[i];
		if (gondolaSeq[i] <= n) {
			if (gondolaSeq[i] < lowbelow || lowbelow == -1) {
				lowbelow = gondolaSeq[i];
				lowind = i;
			}

		}
		else {
			ch[gondolaSeq[i]] = i;
		}
		if (gondolaSeq[i] > maxval) {
			maxval = gondolaSeq[i];
			maxind = i;
		}
	}
	//do not use a vector for ans just add stuff to replacementSeq as you go and increment sz
	int initialvals[n];
	if (lowind == -1) {
		//just do stuff idk - for now we will just do nothing
	}
	int cv = gondolaSeq[lowind];
	int ci = lowind;
	for (int i = 0; i < n; i++) {
		initialvals[ci] = cv;
		ci = (ci+1)%n;
		cv = (cv+1)%n;
		if (cv == 0) cv += n;
	}
	for (int i = 0; i < n; i++) {
		cvals[i] = initialvals[i];
	}
	for (int i = n+1; i <= maxval; i++) {
		if (ch[i]) {
			replacementSeq[sz++] = cvals[ch[i]];
		}
		else {
			replacementSeq[sz++] = cvals[maxind];
			cvals[maxind] = i;
		}
	}

	return sz;
}

//----------------------

int countReplacement(int n, int inputSeq[])
{
	if (valid(n, inputSeq) == 0) { //just add this in there
		return 0;
	}
	int ans = 1;
	vector<int> aftn;
	aftn.push_back(n);
	for (int i = 0; i < n; i++) {
		if (inputSeq[i] > n) {
			aftn.push_back(inputSeq[i]);
		}
	}
	sort(aftn.begin(), aftn.end());
	for (int i = 1; i < aftn.size(); i++) {
		int rep = aftn[i]-aftn[i-1]-1;
		int ops = aftn.size() - i;
		//cout << "here: " << aftn[i] << " rep, ops: " << rep << " " << ops << endl;
		ans = (ans * 1LL * modpow(ops, rep))%mod;
	}

	return ans;
}

Compilation message

gondola.cpp: In function 'int valid(int, int*)':
gondola.cpp:37:6: warning: unused variable 'maxv' [-Wunused-variable]
  int maxv = -1;
      ^~~~
gondola.cpp: In function 'int countReplacement(int, int*)':
gondola.cpp:128:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 1; i < aftn.size(); i++) {
                  ~~^~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 428 KB Output is correct
4 Correct 2 ms 428 KB Output is correct
5 Correct 2 ms 504 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 564 KB Output is correct
2 Correct 2 ms 564 KB Output is correct
3 Correct 2 ms 684 KB Output is correct
4 Correct 2 ms 684 KB Output is correct
5 Correct 2 ms 684 KB Output is correct
6 Correct 20 ms 2644 KB Output is correct
7 Correct 15 ms 2644 KB Output is correct
8 Correct 36 ms 4436 KB Output is correct
9 Correct 12 ms 4436 KB Output is correct
10 Correct 46 ms 5092 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5092 KB Output is correct
2 Correct 2 ms 5092 KB Output is correct
3 Correct 2 ms 5092 KB Output is correct
4 Correct 2 ms 5092 KB Output is correct
5 Correct 2 ms 5092 KB Output is correct
6 Correct 19 ms 5092 KB Output is correct
7 Correct 15 ms 5092 KB Output is correct
8 Correct 42 ms 5092 KB Output is correct
9 Correct 11 ms 5092 KB Output is correct
10 Correct 52 ms 5104 KB Output is correct
11 Correct 3 ms 5104 KB Output is correct
12 Correct 2 ms 5104 KB Output is correct
13 Correct 24 ms 5104 KB Output is correct
14 Correct 2 ms 5104 KB Output is correct
15 Correct 83 ms 5232 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5232 KB Output is correct
2 Correct 2 ms 5232 KB Output is correct
3 Correct 2 ms 5232 KB Output is correct
4 Correct 2 ms 5232 KB Output is correct
5 Correct 2 ms 5232 KB Output is correct

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5232 KB Output is correct
2 Correct 2 ms 5232 KB Output is correct
3 Correct 2 ms 5232 KB Output is correct
4 Correct 2 ms 5232 KB Output is correct
5 Correct 2 ms 5232 KB Output is correct
6 Correct 2 ms 5232 KB Output is correct
7 Correct 3 ms 5232 KB Output is correct
8 Incorrect 4 ms 5232 KB Integer 0 violates the range [1, 4637]
9 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5232 KB Output is correct
2 Correct 2 ms 5232 KB Output is correct
3 Correct 2 ms 5232 KB Output is correct
4 Correct 2 ms 5232 KB Output is correct
5 Correct 2 ms 5232 KB Output is correct
6 Correct 2 ms 5232 KB Output is correct
7 Correct 3 ms 5232 KB Output is correct
8 Incorrect 4 ms 5232 KB Integer 0 violates the range [1, 4637]
9 Halted 0 ms 0 KB -

Subtask #7
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5232 KB Output is correct
2 Correct 2 ms 5232 KB Output is correct
3 Correct 2 ms 5232 KB Output is correct

Subtask #8
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5232 KB Output is correct
2 Correct 3 ms 5232 KB Output is correct
3 Correct 2 ms 5232 KB Output is correct
4 Correct 2 ms 5232 KB Output is correct
5 Correct 2 ms 5232 KB Output is correct
6 Correct 3 ms 5232 KB Output is correct
7 Correct 2 ms 5232 KB Output is correct
8 Correct 2 ms 5232 KB Output is correct

Subtask #9
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5232 KB Output is correct
2 Correct 2 ms 5232 KB Output is correct
3 Correct 2 ms 5232 KB Output is correct
4 Correct 3 ms 5232 KB Output is correct
5 Correct 2 ms 5232 KB Output is correct
6 Correct 2 ms 5232 KB Output is correct
7 Correct 2 ms 5232 KB Output is correct
8 Correct 2 ms 5232 KB Output is correct
9 Correct 97 ms 5232 KB Output is correct
10 Correct 43 ms 5232 KB Output is correct
11 Correct 17 ms 5232 KB Output is correct
12 Correct 26 ms 5232 KB Output is correct
13 Incorrect 6 ms 5232 KB Output isn't correct

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5232 KB Output is correct
2 Correct 2 ms 5232 KB Output is correct
3 Correct 2 ms 5232 KB Output is correct
4 Correct 2 ms 5232 KB Output is correct
5 Correct 2 ms 5232 KB Output is correct
6 Correct 2 ms 5232 KB Output is correct
7 Correct 2 ms 5232 KB Output is correct
8 Correct 2 ms 5232 KB Output is correct
9 Correct 83 ms 5232 KB Output is correct
10 Correct 62 ms 5232 KB Output is correct
11 Correct 20 ms 5232 KB Output is correct
12 Correct 26 ms 5232 KB Output is correct
13 Incorrect 7 ms 5232 KB Output isn't correct
14 Halted 0 ms 0 KB -