This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#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[2][2505][2505],x[2]={29,31};
int nx[2505][2505];
ll dp[2505][2505];
map<ll,int> mp;
int main(){
sf("%d",&n);
sf(" %s",&s);
sf("%d%d%d",&a,&b,&c);
for(int z=0;z<2;++z){
for(int i=0;i<n;++i){
hh[z][i][i]=s[i]-'a'+1;
for(int j=i+1;j<n;++j){
hh[z][i][j]=((ll)hh[z][i][j-1]*x[z]+s[j]-'a'+1)%mod;
}
}
}
for(int l=1;l<=n;++l){
mp.clear();
for(int i=n-1;i>=0;--i){
int j=i+l;
if(j+l-1<=n-1){
int k=j+l-1;
ll x=(ll)hh[0][j][k]*mod+hh[1][j][k];
mp[x]=j;
}
ll x=(ll)hh[0][i][i+l-1]*mod+hh[1][i][i+l-1];
if(mp.find(x)!=mp.end())nx[i][i+l-1]=mp[x];
else nx[i][i+l-1]=n;
}
}
/*
for(int i=0;i<n;++i){
for(int j=i;j<n;++j){
pf("nx ");
for(int k=i;k<=j;++k)pf("%c",s[k]);
pf(": %d\n",nx[i][j]);
}
}
*/
for(int i=n-1;i>=0;--i){
for(int j=i;j<n;++j){
dp[i][j]=dp[i+1][j]+a;
}
for(int j=i;j<n;++j){
int l=j-i+1;
mnto(dp[i][j],dp[i][j-1]+a);
int u=i,cnt=1;
while(u!=n){
u=nx[u][u+l-1];
++cnt;
int tot=u+l-i;
ll cost=dp[i][j]+b+(ll)cnt*c+(ll)(tot-cnt*l)*a;
mnto(dp[i][u+l-1],cost);
}
}
}
pf("%lld\n",dp[0][n-1]);
}
Compilation message (stderr)
copypaste3.cpp: In function 'int main()':
copypaste3.cpp:67:8: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[2505]' [-Wformat=]
67 | sf(" %s",&s);
| ~^ ~~
| | |
| | char (*)[2505]
| char*
copypaste3.cpp:66:4: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
66 | sf("%d",&n);
| ^
copypaste3.cpp:67:4: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
67 | sf(" %s",&s);
| ^
copypaste3.cpp:68:4: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
68 | sf("%d%d%d",&a,&b,&c);
| ^
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