oj.uz

Submission #701437

# Submission time Handle Problem Language Result Execution time Memory
701437 2023-02-21T08:42:56 Z guagua0407 Sateliti (COCI20_satellti) C++17
110 / 110
 602 ms 37772 KB 
/*
燒雞
 燒雞
  燒雞    好想進選訓
 燒雞
燒雞
*/
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define f first
#define s second
#define all(x) x.begin(),x.end() 
#define _ ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}

const int mxn=1005;
const int MOD=1e9+7;
char S[2*mxn][2*mxn];
ll hashv[2*mxn][2*mxn];
ll powx[2*mxn],powy[2*mxn];
random_device rng;
mt19937_64 seed(rng());
//ll X=abs((ll)seed());
//ll Y=abs((ll)seed());

ll X=3;
ll Y=4;

void genhash(int n,int m){
    powx[0]=powy[0]=1;
    for(int i=1;i<2*mxn;i++){
        powx[i]=(powx[i-1]*X)%MOD;
    }
    for(int i=1;i<2*mxn;i++){
        powy[i]=(powy[i-1]*Y)%MOD;
    }
    for(int i=1;i<=2*n;i++){
        for(int j=1;j<=2*m;j++){
            hashv[i][j]=(hashv[i][j-1]*X%MOD+S[i][j])%MOD;
        }
    }
    for(int j=1;j<=2*m;j++){
        for(int i=1;i<=2*n;i++){
            hashv[i][j]=(hashv[i-1][j]*Y%MOD+hashv[i][j])%MOD;
        }
    }
}

int cal(int a,int b,int xx,int yy){
    int x=a+xx-1;
    int y=b+yy-1;
    ll ans=(hashv[x][y]-hashv[x][b-1]*powx[y-b+1]%MOD-hashv[a-1][y]*powy[x-a+1]%MOD);
    if(ans<0) ans+=MOD;
    ans=(ans+hashv[a-1][b-1]*powy[x-a+1]%MOD*powx[y-b+1])%MOD;
    return ans;
}

int main() {_
    //setIO("wayne");
    int n,m;
    cin>>n>>m;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            cin>>S[i][j];
            S[i+n][j]=S[i][j+m]=S[i+n][j+m]=S[i][j];
        }
    }
    genhash(n,m);
    int ansx=1,ansy=1;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            int l=i-1,r=i+n-1;
            while(l<r){
                int mid=(l+r+1)/2;
                if(cal(i,j,mid-i+1,m)==cal(ansx,ansy,mid-i+1,m)){
                    l=mid;
                }
                else{
                    r=mid-1;
                }
            }
            int row=l+1;
            l=j-1;
            r=j+m-1;
            while(l<r){
                int mid=(l+r+1)/2;
                if(cal(row,j,1,mid-j+1)==cal(ansx+(row-i),ansy,1,mid-j+1)){
                    l=mid;
                }
                else{
                    r=mid-1;
                }
            }
            int col=l+1;
            if(row<=i+n-1 and col<=j+m-1){
                if(S[row][col]<S[ansx+(row-i)][ansy+(col-j)]){
                    ansx=i,ansy=j;
                }
            }
        }
    }
    for(int i=ansx;i<=ansx+n-1;i++){
        for(int j=ansy;j<=ansy+m-1;j++){
            cout<<S[i][j];
        }
        cout<<'\n';
    }
    return 0;
}
//maybe its multiset not set

Compilation message

Main.cpp: In function 'void setIO(std::string)':
Main.cpp:18:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:19:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 980 KB Output is correct
2 Correct 2 ms 980 KB Output is correct
3 Correct 2 ms 968 KB Output is correct
4 Correct 2 ms 980 KB Output is correct
5 Correct 2 ms 1056 KB Output is correct
6 Correct 1 ms 980 KB Output is correct
7 Correct 2 ms 980 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 980 KB Output is correct
2 Correct 2 ms 980 KB Output is correct
3 Correct 2 ms 968 KB Output is correct
4 Correct 2 ms 980 KB Output is correct
5 Correct 2 ms 1056 KB Output is correct
6 Correct 1 ms 980 KB Output is correct
7 Correct 2 ms 980 KB Output is correct
8 Correct 46 ms 6652 KB Output is correct
9 Correct 2 ms 596 KB Output is correct
10 Correct 2 ms 3924 KB Output is correct
11 Correct 42 ms 6640 KB Output is correct
12 Correct 45 ms 6740 KB Output is correct
13 Correct 43 ms 6868 KB Output is correct
14 Correct 47 ms 6876 KB Output is correct
15 Correct 43 ms 6876 KB Output is correct
16 Correct 51 ms 6876 KB Output is correct
17 Correct 67 ms 6868 KB Output is correct

Subtask #3
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 980 KB Output is correct
2 Correct 2 ms 980 KB Output is correct
3 Correct 2 ms 968 KB Output is correct
4 Correct 2 ms 980 KB Output is correct
5 Correct 2 ms 1056 KB Output is correct
6 Correct 1 ms 980 KB Output is correct
7 Correct 2 ms 980 KB Output is correct
8 Correct 46 ms 6652 KB Output is correct
9 Correct 2 ms 596 KB Output is correct
10 Correct 2 ms 3924 KB Output is correct
11 Correct 42 ms 6640 KB Output is correct
12 Correct 45 ms 6740 KB Output is correct
13 Correct 43 ms 6868 KB Output is correct
14 Correct 47 ms 6876 KB Output is correct
15 Correct 43 ms 6876 KB Output is correct
16 Correct 51 ms 6876 KB Output is correct
17 Correct 67 ms 6868 KB Output is correct
18 Correct 544 ms 37248 KB Output is correct
19 Correct 11 ms 12628 KB Output is correct
20 Correct 9 ms 1072 KB Output is correct
21 Correct 507 ms 37288 KB Output is correct
22 Correct 602 ms 37636 KB Output is correct
23 Correct 528 ms 37772 KB Output is correct
24 Correct 596 ms 37628 KB Output is correct
25 Correct 524 ms 37636 KB Output is correct
26 Correct 570 ms 37668 KB Output is correct
27 Correct 579 ms 37700 KB Output is correct