oj.uz

Submission #712114

# Submission time Handle Problem Language Result Execution time Memory
712114 2023-03-18T07:11:20 Z guagua0407 Sateliti (COCI20_satellti) C++17
110 / 110
 510 ms 37728 KB 
/*
燒雞
 燒雞
  燒雞    好想進選訓
 燒雞
燒雞
*/
#pragma GCC optimize("O4")
#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: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 + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:20:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |     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 1 ms 980 KB Output is correct
3 Correct 2 ms 980 KB Output is correct
4 Correct 2 ms 964 KB Output is correct
5 Correct 1 ms 980 KB Output is correct
6 Correct 2 ms 980 KB Output is correct
7 Correct 1 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 1 ms 980 KB Output is correct
3 Correct 2 ms 980 KB Output is correct
4 Correct 2 ms 964 KB Output is correct
5 Correct 1 ms 980 KB Output is correct
6 Correct 2 ms 980 KB Output is correct
7 Correct 1 ms 980 KB Output is correct
8 Correct 37 ms 6784 KB Output is correct
9 Correct 2 ms 596 KB Output is correct
10 Correct 3 ms 3924 KB Output is correct
11 Correct 37 ms 6612 KB Output is correct
12 Correct 44 ms 6768 KB Output is correct
13 Correct 37 ms 6884 KB Output is correct
14 Correct 42 ms 6876 KB Output is correct
15 Correct 38 ms 6868 KB Output is correct
16 Correct 44 ms 6980 KB Output is correct
17 Correct 43 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 1 ms 980 KB Output is correct
3 Correct 2 ms 980 KB Output is correct
4 Correct 2 ms 964 KB Output is correct
5 Correct 1 ms 980 KB Output is correct
6 Correct 2 ms 980 KB Output is correct
7 Correct 1 ms 980 KB Output is correct
8 Correct 37 ms 6784 KB Output is correct
9 Correct 2 ms 596 KB Output is correct
10 Correct 3 ms 3924 KB Output is correct
11 Correct 37 ms 6612 KB Output is correct
12 Correct 44 ms 6768 KB Output is correct
13 Correct 37 ms 6884 KB Output is correct
14 Correct 42 ms 6876 KB Output is correct
15 Correct 38 ms 6868 KB Output is correct
16 Correct 44 ms 6980 KB Output is correct
17 Correct 43 ms 6868 KB Output is correct
18 Correct 442 ms 37592 KB Output is correct
19 Correct 10 ms 12628 KB Output is correct
20 Correct 8 ms 988 KB Output is correct
21 Correct 475 ms 37632 KB Output is correct
22 Correct 510 ms 37728 KB Output is correct
23 Correct 436 ms 37720 KB Output is correct
24 Correct 501 ms 37716 KB Output is correct
25 Correct 412 ms 37720 KB Output is correct
26 Correct 478 ms 37636 KB Output is correct
27 Correct 484 ms 37684 KB Output is correct