Submission #567857

#	Time	Username	Problem	Language	Result	Execution time	Memory
567857		jamezzz	Copy and Paste 3 (JOI22_copypaste3)	C++17	1 / 100	1764 ms	629196 KiB

copypaste3

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

#ifdef DEBUG
#define dbg(...) printf(__VA_ARGS__);
#define getchar_unlocked getchar
#else
#define dbg(...)
#endif
#define sf scanf
#define pf printf
#define fi first
#define se second
#define pb push_back
#define sz(x) (int)x.size()
#define mnto(x,y) x=min(x,(__typeof__(x))y)
#define mxto(x,y) x=max(x,(__typeof__(x))y)
#define INF 1023456789
#define LINF 1023456789123456789
#define all(x) x.begin(), x.end()
#define disc(x) sort(all(x));x.resize(unique(all(x))-x.begin());
typedef long long ll;
typedef long double ld;
typedef pair<int, int> ii;
typedef pair<ll, ll> pll;
typedef tuple<int, int, int> iii;
typedef tuple<int, int, int, int> iiii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<pll> vll;
mt19937 rng(time(0));

#define mod 1000000007
#define mod2 1000000009

inline int add(int a,int b){
	int r=a+b;
	while(r>=mod)r-=mod;
	while(r<0)r+=mod;
	return r;
}

inline int mult(int a,int b){
	return (int)(((ll)(a*b))%mod);
}

inline int rd(){
	int x=0;
	char ch=getchar_unlocked();
	while(!(ch&16))ch=getchar();//keep reading while current character is whitespace
    while(ch&16){//this will break when ‘\n’ or ‘ ‘ is encountered
		x=(x<<3)+(x<<1)+(ch&15);
		ch=getchar_unlocked();
	}
	return x;
}

int n,a,b,c,cnt;
char s[2505];
int hh[2505][2505],num[2505*2505];
map<ii,int> mp;
vector<ii> v[2505*2505];
vector<int> pos[2505];
ll memo[2505][2505];
unordered_map<int,int> vis[2505][2505];

ll dp(int l,int r){
	if(l==r)return a;
	if(l+1==r){
		if(s[l]!=s[r])return 2*a;
		return min(2*a,a+b+2*c);
	}
	if(memo[l][r]!=-1)return memo[l][r];
	ll ans=(ll)(r-l+1)*a;
	for(int i=l;i<=r;++i){
		for(int j:pos[i]){
			if(j>(r+l)/2+1)break;
			int x=hh[i][j];
			if(vis[l][r][x]!=0)continue;
			vis[l][r][x]=1;
			int far=l-1,cnt=0;
			for(int i=lower_bound(all(v[x]),ii(l,l))-v[x].begin();i<sz(v[x]);++i){
				ii pr=v[x][i];
				if(pr.se>r)break;
				if(far<pr.fi&&pr.se<=r){
					++cnt;
					far=pr.se;
				}
			}
			if(cnt==1)continue;
			ans=min(ans,dp(v[x][0].fi,v[x][0].se)+b+(ll)cnt*c+(ll)(r-l+1-cnt*(j-i+1))*a);
		}
	}
	return memo[l][r]=ans;
}

int main(){
	sf("%d",&n);
	sf(" %s",&s);
	sf("%d%d%d",&a,&b,&c);
	for(int i=0;i<n;++i){
		ll cur=0,cur2=0;
		ll pw=1,pw2=1;
		for(int j=i;j<n;++j){
			cur+=pw*(s[j]-'a'+1);
			cur2+=pw2*(s[j]-'a'+1);
			cur%=mod;
			cur2%=mod2;
			pw*=31;pw%=mod;
			pw2*=31;pw2%=mod2;
			ii pr=ii((int)cur,(int)cur2);
			if(!mp.count(pr)){
				mp[pr]=cnt++;
			}
			hh[i][j]=mp[pr];
			v[hh[i][j]].pb({i,j});
		}
	}
	
	for(int i=n-1;i>=0;--i){
		for(int j=i;j<n;++j){
			if(num[hh[i][j]]!=0)pos[i].pb(j);
			++num[hh[i][j]];
		}
	}
	
	memset(memo,-1,sizeof memo);
	pf("%lld\n",dp(0,n-1));
}

Compilation message (stderr)

copypaste3.cpp: In function 'int main()':
copypaste3.cpp:99:8: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[2505]' [-Wformat=]
   99 |  sf(" %s",&s);
      |       ~^  ~~
      |        |  |
      |        |  char (*)[2505]
      |        char*
copypaste3.cpp:98:4: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   98 |  sf("%d",&n);
      |    ^
copypaste3.cpp:99:4: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   99 |  sf(" %s",&s);
      |    ^
copypaste3.cpp:100:4: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  100 |  sf("%d%d%d",&a,&b,&c);
      |    ^

• Subtask 1: 1 / 1
• Subtask 2: 0 / 5
• Subtask 3: 0 / 14
• Subtask 4: 0 / 10
• Subtask 5: 0 / 32
• Subtask 6: 0 / 38