Submission #1840987

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Source Code Expand

#include<bits/stdc++.h>
#define N 1000006

char s0[N],t[N];
int n;
int val[N],match[N],end[N];
int main(){
    scanf("%d%s%s",&n,s0+1,t+1);
    for(int i=1,p=0,last,lleter;i<=n;i++)
        if(t[i]!=t[i-1]){
            last=-1;end[i]=i;lleter=i;
            while(p+1<=i) p++,last=t[i]==s0[p]? p:last;
            if(last!=-1) match[i]=last;
            else return puts("-1"),0;
        }else end[lleter]=i;
    int shift=0,add=0,ans=0,p=0;
    for(int i=1;i<=n;i++)
        if(match[i]==end[i]){
            continue;
        }else if(match[i]!=0){
            shift++;add++;val[end[i]+1-shift]--;
            for(int j=p+1-shift;j<= match[i]-shift;j++) val[j]+=val[j-1];
            p=match[i]-shift;
            ans=std::max(ans,val[p]+add);
        }
    std::cout<<ans<<std::endl;
    return 0;
}
 

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:8:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%s%s",&n,s0+1,t+1);
                                ^

Judge Result