Submission #68180

#	Time	Username	Problem	Language	Result	Execution time	Memory
68180		hamzqq9	Permutation Recovery (info1cup17_permutation)	C++14	100 / 100	3738 ms	8352 KiB

Main

#include<bits/stdc++.h>
#define st first
#define nd second
#define pb push_back
#define ppb pop_back
#define umax(x,y) x=max(x,y)
#define umin(x,y) x=min(x,y)
#define ll long long
#define ii pair<int,int>
#define iii pair<int,ii>
#define sz(x) ((int) x.size())
#define orta ((bas+son)>>1)
#define all(x) x.begin(),x.end()
#define dbgs(x) cerr<<(#x)<<" --> "<<(x)<<" "
#define dbg(x) cerr<<(#x)<<" --> "<<(x)<<endl;getchar()
#define pw(x) (1<<(x))
#define inf 1000000000
#define MOD 25591308716929
#define N 70005
#define MAX 10000006
#define LOG 30
#define KOK 250
#define form(x) (x<0?x+MOD:x>=MOD?x-MOD:x)
using namespace std;

int n,gsz,cache,len;
ll prevv;
ll lazy[KOK+100];
int sz[KOK+100],ans[N];
pair<ll,int> GR[KOK+100][KOK*4+100];
pair<ll,int> ar[N];
char s[N*20];
unordered_set<ll> MP[KOK+100];

ll get_hash() {

	ll res=0;

	for(int i=1;i<=len;i++) res=(res*10+(s[i]-'0'))%MOD;

	return res;

}

void rebuild() {

	int cnt=0;

	cache=0;

	for(int i=1;i<=gsz;i++) {

		for(int j=1;j<=sz[i];j++) {

			GR[i][j].st=form(GR[i][j].st+lazy[i]);

			ar[++cnt]=GR[i][j];

		}

		MP[i].clear();

	}

	gsz=0;

	for(int i=1;i<=cnt;i+=KOK) {

		++gsz;

		sz[gsz]=0;

		lazy[gsz]=0;

		for(int j=i;j<=min(i+KOK-1,cnt);j++) {

			GR[gsz][++sz[gsz]]=ar[j];

			MP[gsz].insert(ar[j].st);

		}

	}

}

void insert_here(ll val,int ith,int gr) {

	MP[gr].clear();

	if(lazy[gr]) {
	
		for(int i=1;i<=sz[gr];i++) GR[gr][i].st=form(GR[gr][i].st+lazy[gr]);

		lazy[gr]=0;
	
	}

	for(int i=sz[gr];i>=1;i--) {

		if((GR[gr][i].st+1)==val) {

			GR[gr][i+1]={form(GR[gr][i].st+val),ith};

			break ;

		}

		GR[gr][i+1]=GR[gr][i];

		GR[gr][i+1].st=form(GR[gr][i+1].st+val);

	}

	sz[gr]++;

	for(int i=1;i<=sz[gr];i++) {

		MP[gr].insert(GR[gr][i].st);

	}

}

void insert(ll val,int ith) {

	cache++;

	for(int i=gsz;i>=1;i--) {

		ll want=form(val-lazy[i]-1+MOD);

		if(MP[i].find(want)!=MP[i].end()) {

			insert_here(val,ith,i);

			if(cache==KOK*3) {

				rebuild();

			}

			return ;

		}
		else lazy[i]=form(lazy[i]+val);

	}

}

int main() {

	//freopen("input.txt","r",stdin);

	scanf("%d",&n);

	gsz=1;

	GR[1][1]={0,0};

	sz[1]=1;

	MP[1].insert(0);

	for(int i=1;i<=n;i++) {

		scanf("%s",s+1);

		len=strlen(s+1);

		ll num=get_hash();

		ll no=form(num-prevv+MOD);

		prevv=num;

		insert(no,i);

	}

	int val=-1;

	for(int i=1;i<=gsz;i++) {

		for(int j=1;j<=sz[i];j++) {

			ans[GR[i][j].nd]=++val;

		}

	}

	for(int i=1;i<=n;i++) printf("%d ",ans[i]);

}

Compilation message (stderr)

permutation.cpp: In function 'int main()':
permutation.cpp:156:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
  ~~~~~^~~~~~~~~
permutation.cpp:168:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%s",s+1);
   ~~~~~^~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 18 / 18
• Subtask 4: 17 / 17
• Subtask 5: 11 / 11
• Subtask 6: 7 / 7
• Subtask 7: 16 / 16
• Subtask 8: 6 / 6