Submission #61527

#	Time	Username	Problem	Language	Result	Execution time	Memory
61527		Mamnoon_Siam	Calvinball championship (CEOI15_teams)	C++17	40 / 100	1086 ms	8604 KiB

teams

//#pragma GCC optimize("Ofast,unroll-loops,no-stack-protector")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

#include <bits/stdc++.h>
// #include <bits/extc++.h>
using namespace std;

#define debug(s) cout << #s << " = " << s << endl
#define all(v) (v).begin(), (v).end()
#define KeepUnique(v) (v).erase( unique(all(v)), v.end() )
#define MEMSET(a, val) memset(a, val, sizeof (a))
#define PB push_back
#define endl '\n'
typedef long long ll;

inline int myrand(int l, int r) {
	int ret = rand(); ret <<= 15; ret ^= rand();
	if(ret < 0) ret = -ret; ret %= (r-l+1); ret += l;
	return ret;
}

template <typename F, typename S>
ostream& operator << (ostream& os, const pair< F, S>& p) {
	return os<<"(" <<p.first<<", "<<p.second<<")"; }

typedef pair<int, int> ii;

template<typename T> using min_pq =
	std::priority_queue<T, vector<T>, greater<T> >;

//int dx[] = {-1, +0, +1, +0};
//int dy[] = {+0, +1, +0, -1};

#define less klsdjflk

const int maxn = 1005;
const int mod = 1000007;

int n;
vector<int> v;
int dp[maxn][maxn][2];

int get(int p, int mex, int less) {
	if(p == n) return less;
	int &ret = dp[p][mex][less];
	if(ret != -1) return ret;
	ret = 0;
	if(!less) {
		for(int i = 1; i < mex; i++) {
			if(i < v[p]) {
				ret += get(p + 1, mex, 1);
				// if(ret >= mod) ret -= mod;
			}
			else if(i == v[i]) {
				ret += get(p + 1, mex, 0);
				// if(ret >= mod) ret -= mod;;
			}
		}
		if(mex < v[p]) {
			ret += get(p + 1, mex + 1, 1);
			// if(ret >= mod) ret -= mod;
		} else if(mex == v[p]) {
			ret += get(p + 1, mex + 1, 0);
			// if(ret >= mod) ret -= mod;
		}
	} else {
		for(int i = 1; i < mex; i++) {
			ret += get(p + 1, mex, less);
			// if(ret >= mod) ret -= mod;
		}
		ret += get(p + 1, mex + 1, less);
		// if(ret >= mod) ret -= mod;
	}
	ret %= mod;
	return ret;
}

int solve(int p, int mex, int tog, int &res) {
	if(p == n) {
		res++;
		if(res == mod) res = 0;
		return tog;
	}
	int &ret = dp[p][mex][tog];
	if(ret != -1) {
		res += ret;
		if(res >= mod) res -= mod;
		return tog;
	}
	ret = 0;
	for(int i = 1; i < mex; i++) {
		if(solve(p + 1, mex, tog and v[p] == i, ret)) {
			res += ret;
			if(res >= mod) ret -= mod;
			return 1;
		}
	}
	int tmp = solve(p + 1, mex + 1, tog and mex == v[p], ret);
	res += ret;
	if(res >= mod) res -= mod;
	return tmp;
}

int32_t main () {
	// freopen("in", "r", stdin);
    cin >> n;
    v.resize(n);
    for(int &b : v) cin >> b;
    memset(dp, -1, sizeof dp);
	int ans = 0;
	solve(0, 1, 1, ans);
	cout << ans << endl;
}

Compilation message (stderr)

teams.cpp: In function 'int myrand(int, int)':
teams.cpp:18:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
  if(ret < 0) ret = -ret; ret %= (r-l+1); ret += l;
  ^~
teams.cpp:18:26: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
  if(ret < 0) ret = -ret; ret %= (r-l+1); ret += l;
                          ^~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10