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답안 #399893

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
399893 2021-05-06T20:35:56 Z lukameladze The Kingdom of JOIOI (JOI17_joioi) C++14
100 / 100
 2853 ms 196256 KB 
# include <bits/stdc++.h>
#define f first
#define s second
#define pb push_back
using namespace std;
const int N=2005;
long long n,m,mn,mx,a[N][N],i1,j11,i2,j2,le,ri,mid,prmx[N][N],prmn[N][N],sfmn[N][N],sfmx[N][N];
long long mn1,mx1,mxx,mnn,l,r,mi,anss,anss1,idx,ww,j,ans,b[N],bbb[N],bb1[N],pr;
void rotate() {
     for(int i=1;i<=n/2;i++){
		for(int j=1;j<=m;j++){
			swap(a[i][j],a[n-i+1][j]);
		}
	}
	for (int i=1; i<=n; i++) {
          for (int j=1; j<=m; j++) {
               prmn[0][j]=1e10;
               prmx[0][j]=-1e10;
               prmn[i][j]=min(a[i][j],prmn[i-1][j]);
               prmx[i][j]=max(a[i][j],prmx[i-1][j]);
               if (mn>a[i][j]) {
                    i1=i;
                    j11=j;
                    mn=min(mn,a[i][j]);
               }
               if (mx<a[i][j]) {
                    i2=i;
                    j2=j;
                    mx=max(mx,a[i][j]);
               }
          }
     }
     for (int i=n; i>=1; i--) {
          for (int j=1; j<=m; j++) {
               sfmn[n+1][j]=1e10;
               sfmx[n+1][j]=-1e10;
               sfmn[i][j]=min(a[i][j],sfmn[i+1][j]);
               sfmx[i][j]=max(a[i][j],sfmx[i+1][j]);
          }
     }
}
int check(int mid) {
    /*  l=1;
     r=m;
     while (l<=r) {
          mi=(l+r)/2;
          if (prmx[mi]<=mid+mn){
               anss=mi;
               l=mi+1;
          }  else {
               r=mi-1;
          }
     }
    l=1;
     r=m;
     while (l<=r) {
          mi=(l+r)/2;
          //cout<<mi<<" "<<sfmn[mi]<<endl;
          if (sfmn[mi]>=mx-mid){
               anss1=mi;
               r=mi-1;
          }  else {
               l=mi+1;
          }
     }
     cout<<anss1<<endl;
     if (anss>=anss1) return 1;
     if (anss<anss1-1) return 0;
     idx=n+1;ww=0;
     for (int i=1; i<=n; i++) {
          j=anss+1;
          if(a[i][j]>mn+mid) {
               idx=i;
               break;
          }
     }
     for (int i=n; i>=idx; i--) {
          if (a[i][j]<mx-mid) {
               ww=1;
          }
     }
     if (!ww) return 1;
     ww=0;
     idx=0;
     for (int i=n; i>=1; i--) {
          j=anss+1;
          if(a[i][j]>mn+mid) {
               idx=i;
               break;
          }
     }
     for (int i=1; i<=idx; i++) {
          if (a[i][j]<mx-mid) {
               ww=1;
          }
     }
     if (!ww) return 1;
     return 0;
     */
    int ww=0;
     int bb=0;
     int ss=0;
     int id=0;
     for (int j=1; j<=m; j++) {
          id=n+1;
          for (int i=1; i<=n; i++) {
               if (prmx[i][j]>mn+mid) {
                    id=i;
                    break;
               }
          }
          if (id!=n+1 && !bb) bb=j;
          b[j]=id;
     }
    
    pr=1e10;
     for (int j=1; j<=m; j++) {
          pr=min(pr,b[j]);
          bbb[j]=pr;
     }
     pr=1e10;
     for (int j=m; j>=1; j--) {
          pr=min(pr,b[j]);
          bb1[j]=pr;
     }
   
     ww=0;
     for (int j=1; j<=m; j++) {
          if (bbb[j]==n+1) continue;
          //cout<<j<<" "<<bbb[j]<<" "<<sfmn[bbb[j]][j]<<endl;
          if (sfmn[bbb[j]][j]<mx-mid) {
               ww++;
               break;
          }
     }
     for (int j=1; j<=m; j++) {
          if (bb1[j]==n+1) continue;
         //  cout<<j<<" "<<b[j]<<" "<<sfmn[b[j]][j]<<endl;
          if (sfmn[bb1[j]][j]<mx-mid) {
               ww++;
               break;
          }
     }
     if (ww==2) return 0;
     return 1;
}
int main() {
     cin>>n>>m;
     mn=1e10;
     mx=-1e10;
     for (int i=1; i<=n; i++) {
          for (int j=1; j<=m; j++) {
               prmn[0][j]=1e10;
               prmx[0][j]=-1e10;
               cin>>a[i][j];
               prmn[i][j]=min(a[i][j],prmn[i-1][j]);
               prmx[i][j]=max(a[i][j],prmx[i-1][j]);
               if (mn>a[i][j]) {
                    i1=i;
                    j11=j;
                    mn=min(mn,a[i][j]);
               }
               if (mx<a[i][j]) {
                    i2=i;
                    j2=j;
                    mx=max(mx,a[i][j]);
               }
          }
     }
     for (int i=n; i>=1; i--) {
          for (int j=1; j<=m; j++) {
               sfmn[n+1][j]=1e10;
               sfmx[n+1][j]=-1e10;
               sfmn[i][j]=min(a[i][j],sfmn[i+1][j]);
               sfmx[i][j]=max(a[i][j],sfmx[i+1][j]);
          }
     }
     ans=mx-mn;
     le=0;
     ri=ans;
     while (le<=ri) {
          mid=(le+ri)/2;
          if (check(mid)) {
               ri=mid-1;
               ans=min(ans,mid);
          } else {
               le=mid+1;
          }
     }
     rotate();
     le=0;
     ri=ans;
     while (le<=ri) {
          mid=(le+ri)/2;
          if (check(mid)) {
               ri=mid-1;
               ans=min(ans,mid);
          } else {
               le=mid+1;
          }
     }
     cout<<ans<<endl;
}

Compilation message

joioi.cpp: In function 'int check(int)':
joioi.cpp:102:10: warning: unused variable 'ss' [-Wunused-variable]
  102 |      int ss=0;
      |          ^~

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 460 KB Output is correct
2 Correct 1 ms 460 KB Output is correct
3 Correct 1 ms 460 KB Output is correct
4 Correct 1 ms 460 KB Output is correct
5 Correct 1 ms 460 KB Output is correct
6 Correct 1 ms 460 KB Output is correct
7 Correct 1 ms 460 KB Output is correct
8 Correct 1 ms 556 KB Output is correct
9 Correct 1 ms 460 KB Output is correct
10 Correct 1 ms 460 KB Output is correct
11 Correct 1 ms 460 KB Output is correct
12 Correct 1 ms 460 KB Output is correct
13 Correct 1 ms 460 KB Output is correct
14 Correct 1 ms 460 KB Output is correct

Subtask #2
45.0 / 45.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 460 KB Output is correct
2 Correct 1 ms 460 KB Output is correct
3 Correct 1 ms 460 KB Output is correct
4 Correct 1 ms 460 KB Output is correct
5 Correct 1 ms 460 KB Output is correct
6 Correct 1 ms 460 KB Output is correct
7 Correct 1 ms 460 KB Output is correct
8 Correct 1 ms 556 KB Output is correct
9 Correct 1 ms 460 KB Output is correct
10 Correct 1 ms 460 KB Output is correct
11 Correct 1 ms 460 KB Output is correct
12 Correct 1 ms 460 KB Output is correct
13 Correct 1 ms 460 KB Output is correct
14 Correct 1 ms 460 KB Output is correct
15 Correct 2 ms 592 KB Output is correct
16 Correct 10 ms 5800 KB Output is correct
17 Correct 19 ms 6208 KB Output is correct
18 Correct 17 ms 6092 KB Output is correct
19 Correct 17 ms 6124 KB Output is correct
20 Correct 16 ms 5484 KB Output is correct
21 Correct 22 ms 6200 KB Output is correct
22 Correct 21 ms 6212 KB Output is correct
23 Correct 21 ms 6324 KB Output is correct
24 Correct 18 ms 5540 KB Output is correct
25 Correct 24 ms 6200 KB Output is correct
26 Correct 23 ms 6228 KB Output is correct
27 Correct 22 ms 6264 KB Output is correct
28 Correct 22 ms 6340 KB Output is correct

Subtask #3
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 460 KB Output is correct
2 Correct 1 ms 460 KB Output is correct
3 Correct 1 ms 460 KB Output is correct
4 Correct 1 ms 460 KB Output is correct
5 Correct 1 ms 460 KB Output is correct
6 Correct 1 ms 460 KB Output is correct
7 Correct 1 ms 460 KB Output is correct
8 Correct 1 ms 556 KB Output is correct
9 Correct 1 ms 460 KB Output is correct
10 Correct 1 ms 460 KB Output is correct
11 Correct 1 ms 460 KB Output is correct
12 Correct 1 ms 460 KB Output is correct
13 Correct 1 ms 460 KB Output is correct
14 Correct 1 ms 460 KB Output is correct
15 Correct 2 ms 592 KB Output is correct
16 Correct 10 ms 5800 KB Output is correct
17 Correct 19 ms 6208 KB Output is correct
18 Correct 17 ms 6092 KB Output is correct
19 Correct 17 ms 6124 KB Output is correct
20 Correct 16 ms 5484 KB Output is correct
21 Correct 22 ms 6200 KB Output is correct
22 Correct 21 ms 6212 KB Output is correct
23 Correct 21 ms 6324 KB Output is correct
24 Correct 18 ms 5540 KB Output is correct
25 Correct 24 ms 6200 KB Output is correct
26 Correct 23 ms 6228 KB Output is correct
27 Correct 22 ms 6264 KB Output is correct
28 Correct 22 ms 6340 KB Output is correct
29 Correct 1303 ms 171520 KB Output is correct
30 Correct 1478 ms 178932 KB Output is correct
31 Correct 1601 ms 180252 KB Output is correct
32 Correct 1631 ms 180540 KB Output is correct
33 Correct 1172 ms 158236 KB Output is correct
34 Correct 1678 ms 180688 KB Output is correct
35 Correct 2752 ms 195916 KB Output is correct
36 Correct 1783 ms 190132 KB Output is correct
37 Correct 2853 ms 196256 KB Output is correct