oj.uz

답안 #120145

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
120145 2019-06-23T14:51:04 Z errorgorn JOIOJI (JOI14_joioji) C++14
0 / 100
 1000 ms 62180 KB 
#include <cstdio>
#include <unordered_map>
#include <utility>
#include <string>
#include <iostream>
#include <cstring>
#include <algorithm>
using namespace std;
typedef pair<int,int> ii;
int n;
char c;
string s;
struct custom_hash{
    size_t operator()(const pair<int,int> &i)const{
        return (i.first<<8)^i.second;
    }
};
unordered_map<ii,int,custom_hash> suffix;
int arr[3];
int pre[3];
int main(){
    suffix.reserve(1024);
    suffix.max_load_factor(0.25);
    freopen("input.txt","r",stdin);
    scanf("%d",&n);
    getchar();
    c=getchar();
    while (c!='\n'){
        s+=c;
        if (c=='J') arr[0]++;
        else if (c=='O') arr[1]++;
        else arr[2]++;
        c=getchar();
    }
    suffix[ii(0,0)]=0;
    for (int x=0;x<3;x++) pre[x]=arr[x];
    for (int x=0;x<s.size();x++){
        if (s[x]=='J') pre[0]--;
        else if (s[x]=='O') pre[1]--;
        else pre[2]--;
        suffix[ii(pre[0]-pre[1],pre[0]-pre[2])]=x+1;
    }
    memset(pre,0,sizeof(pre));
    int ans=0;
    int a=arr[0]-arr[1],b=arr[0]-arr[2];
    for (int x=0;x<s.size();x++){
        ans=max(ans,suffix[ii(a-(pre[0]-pre[1]),b-(pre[0]-pre[2]))]-x);
        if (s[x]=='J') pre[0]++;
        else if (s[x]=='O') pre[1]++;
        else pre[2]++;
    }
    printf("%d\n",ans);
}

Compilation message

joioji.cpp: In function 'int main()':
joioji.cpp:37:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int x=0;x<s.size();x++){
                  ~^~~~~~~~~
joioji.cpp:46:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int x=0;x<s.size();x++){
                  ~^~~~~~~~~
joioji.cpp:24:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     freopen("input.txt","r",stdin);
     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
joioji.cpp:25:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
     ~~~~~^~~~~~~~~

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1076 ms 62000 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #2
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1087 ms 62180 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 80.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1065 ms 62136 KB Time limit exceeded
2 Halted 0 ms 0 KB -