Submission #577341

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Source Code Expand

#include<cstdio>
#include<algorithm>
#define N 100100
using namespace std;
char s[N];
int l[N],r[N],ln[N],rn[N],lto[N],rto[N];
int main(){
    int n,i,lt=0,rt=0,ans=0;
    scanf("%d",&n);
    scanf("%s",s+1);
    for(i=1;i<=n;i++){
        if(s[i]=='>') l[i]=l[i-1]+1,ln[lt++]=i-1;
        else l[i]=l[i-1];
    }
    ln[lt]=n;
    for(int i=n;i>=1;i--){
        if(s[i]=='<') r[i]=r[i+1]+1,rn[rt++]=n-i;
        else r[i]=r[i+1];
    }
    rn[rt]=n;
    lto[n+1]=n+1;
    for(int i=n;i>=1;i--){
        if(i==n||s[i+1]=='<') lto[i]=i+1;
        else lto[i]=lto[i+1];
    }
    rto[0]=0;
    for(int i=1;i<=n;i++){
        if(i==1||s[i-1]=='>') rto[i]=i-1;
        else rto[i]=rto[i-1];
    }
    for(int i=1;i<=n;i++){
        if(s[i]=='>'){
            if(l[i]>r[lto[i]]) ans=max(ans,n-ln[l[i]-r[lto[i]]-1]);
            else ans=max(ans,n-rn[r[lto[i]]-l[i]]);
        }
        else{
            if(r[i]>l[rto[i]]) ans=max(ans,n-rn[r[i]-l[rto[i]]-1]);
            else ans=max(ans,n-ln[l[rto[i]]-r[i]]);
        }

    }
    printf("%d\n",ans);
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:9:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
                   ^
./Main.cpp:10:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%s",s+1);
                    ^

Judge Result