Submission #1240794

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Source Code Expand

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

#define MAX 200002

int n;
int v;

vector<int> vv;

int dp[MAX][20];
int val[MAX];



map<int, vector<int> > mp;

vector<vector<int> > V;


vector<int> VV;

int mx = 0;

int D[1 << 17];
bool ok(){
	if (VV.size() == 0){
		return true;
	}
	int N = VV.size();
	for (int i = 1; i <= mx; i++){
		dp[N - 1][i] = N - 1;
	}
	for (int i = N - 2; i >= 0; i--){
		long long int d = VV[i + 1] - VV[i];
		for (int j = 1; j <= mx; j++){
			if (d <= val[j]){
				dp[i][j] = dp[i + 1][j];
			}
			else{
				dp[i][j] = i;
			}
		}
	}
	memset(D, 0, sizeof(D));
	for (int i = 0; i < (1 << mx); i++){
		if (D[i] >= N){
			return true;
		}
		for (int j = 1; j <= mx; j++){
			if ((i >> (j - 1)) & 1)continue;
			int go = i | (1 << (j - 1));
			D[go] = max(D[go], dp[D[i]][j]+1);
		}
	}
	return false;
}
bool ans[MAX];

int main(){
	cin >> n >> v;
	for (int i = 0; i < n; i++){
		int x;
		scanf("%d", &x);
		vv.push_back(x);
	}
	
	val[0] = v;
	for (mx = 1; v / 2 >= 0; mx++){
		v /= 2;
		val[mx] = v;
		if (v == 0)break;
	}
	for (int i = 0; i <= mx; i++){
		dp[n - 1][i] = n-1;
	}
	for (int i = n - 2; i >= 0; i--){
		long long int d = vv[i + 1] - vv[i];
		for (int j = 0; j <= mx; j++){
			if (d <= val[j]){
				dp[i][j] = dp[i + 1][j];
			}
			else{
				dp[i][j] = i;
			}
		}
	}
	for (int i = 0; i < n; i++){
		mp[dp[i][0]].push_back(i);
	}
	if (mp.size()>mx+1){
		
	}
	else{
		for (auto it = mp.begin(); it != mp.end(); it++){
			VV.clear();
			for (int i = 0; i < n; i++){
				if (i < (*it).second[0] || (*it).second.back() < i){
					VV.push_back(vv[i]);
				}
			}
			if (ok()){
				vector<int> &vvv = (*it).second;
				for (int j = 0; j < vvv.size(); j++){
					ans[vvv[j]] = true;
				}
			}
		}
	}
	for (int i = 0; i < n; i++){
		if (ans[i] == true){
			puts("Possible");
		}
		else{
			puts("Impossible");
		}
	}
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:66:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &x);
                  ^

Judge Result