Submission #58479

#	Time	Username	Problem	Language	Result	Execution time	Memory
58479		andy627	구간 성분 (KOI15_interval)	C++17	100 / 100	273 ms	884 KiB

interval

#include <stdio.h>
#include <string.h>
#include <vector>
#include <algorithm>
#define LL long long
#define pll pair<LL,LL>
#define plli pair<pll,int>
#define ff first
#define ss second
using namespace std;

char s1[1555],s2[1555];
LL MOD[2]={(LL)1e9+7,(LL)1e9+9};
LL mul[2][1555];
LL hash1[2][1555],hash2[2][1555];
vector<plli> res;

int main(){
    int len1,len2,len;

    scanf("%s %s",s1,s2);
    len1=strlen(s1); len2=strlen(s2);
    len=min(len1,len2);

    mul[0][0]=mul[1][0]=1;
    for(int t=0;t<2;t++)
        for(int i=1;i<26;i++) mul[t][i]=(mul[t][i-1]*len)%MOD[t];

    int ans=0;
    for(int t=0;t<2;t++){
        for(int i=0;i<len1;i++) hash1[t][i]=mul[t][s1[i]-'a'];
        for(int i=0;i<len2;i++) hash2[t][i]=mul[t][s2[i]-'a'];
    }
    for(int i=0;i<len1;i++) res.push_back({{hash1[0][i],hash1[1][i]},1});
    for(int i=0;i<len2;i++) res.push_back({{hash2[0][i],hash2[1][i]},2});
    sort(res.begin(),res.end());

//    printf("1\n");
//    for(int i=0;i<res.size();i++) printf("%10lld %10lld %d\n",res[i].ff.ff,res[i].ff.ss,res[i].ss);
//    printf("\n\n\n");

    for(int i=1;i<res.size();i++){
        if(res[i-1].ff==res[i].ff && res[i-1].ss+res[i].ss==3) ans=1;
    }

    for(int i=1;i<len;i++){
        res.clear();
        for(int t=0;t<2;t++){
            for(int j=len1-1;j>=i-1;j--) hash1[t][j]=(hash1[t][j-1]+mul[t][s1[j]-'a'])%MOD[t];
            for(int j=len2-1;j>=i-1;j--) hash2[t][j]=(hash2[t][j-1]+mul[t][s2[j]-'a'])%MOD[t];
        }
        for(int j=i-1;j<len1;j++) res.push_back({{hash1[0][j],hash1[1][j]},1});
        for(int j=i-1;j<len2;j++) res.push_back({{hash2[0][j],hash2[1][j]},2});
        sort(res.begin(),res.end());

//        printf("%d\n",i+1);
//        for(int i=0;i<res.size();i++) printf("%10lld %10lld %d\n",res[i].ff.ff,res[i].ff.ss,res[i].ss);
//        printf("\n\n\n");

        for(int j=1;j<res.size();j++){
            if(res[j-1].ff==res[j].ff && res[j-1].ss+res[j].ss==3) ans=i+1;
        }
    }

    printf("%d",ans);

    return 0;
}

Compilation message (stderr)

interval.cpp: In function 'int main()':
interval.cpp:42:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=1;i<res.size();i++){
                 ~^~~~~~~~~~~
interval.cpp:60:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j=1;j<res.size();j++){
                     ~^~~~~~~~~~~
interval.cpp:21:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%s %s",s1,s2);
     ~~~~~^~~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 23 / 23
• Subtask 3: 31 / 31
• Subtask 4: 39 / 39