oj.uz

Submission #166379

# Submission time Handle Problem Language Result Execution time Memory
166379 2019-12-01T20:17:34 Z knon0501 None (KOI18_matrix) C++14
100 / 100
 2303 ms 90820 KB 
#include <bits/stdc++.h>
using namespace std;
int m,n;
const int MX=2e5+5;
struct A{
    int x,y,z;
    bool operator <(const A&r){
        return x<r.x;
    }
}a[MX];
struct Node{
    int l,r,v;
}seg[MX*20];
int tree[MX];
int dp[MX];
map<int,int> mp1;
map<int,int> mp2;
int nn;

int f(int lef,int rig,int k,int lev){
    if(lef>k || lev==0)return 2e9;
    if(rig<=k)return seg[lev].v;
    int mid=(lef+rig)/2;
    return min(f(lef,mid,k,seg[lev].l),f(mid+1,rig,k,seg[lev].r));
}
void upd(int lef,int rig,int x,int y,int lev){
    seg[lev].v=min(seg[lev].v,y);
    if(lef==rig)return;
    int mid=(lef+rig)/2;
    if(x<=mid){
        if(!seg[lev].l)seg[seg[lev].l=++nn].v=2e9;
        upd(lef,mid,x,y,seg[lev].l);
    }
    else{
        if(!seg[lev].r)seg[seg[lev].r=++nn].v=2e9;
        upd(mid+1,rig,x,y,seg[lev].r);
    }
}
int main(){
    cin.tie(0);
    ios_base::sync_with_stdio(0);
    cin>>m>>n;
    int i,j;
    for(i=1 ; i<=n ; i++)cin>>a[i].x;
    for(i=1 ; i<=n ; i++)cin>>a[i].y;
    for(i=1 ; i<=n ; i++)cin>>a[i].z;
    for(i=1 ; i<=n ; i++)seg[tree[i]=i].v=2e9;
    nn=n;
    set<int> S1;
    set<int> S2;
    sort(a+1,a+n+1);
    for(i=1 ; i<=n ; i++){
        S1.insert(a[i].y);
        S2.insert(a[i].z);
    }
    int cnt=0;
    for(auto k: S1)mp1[k]=++cnt;cnt=0;
    for(auto k: S2)mp2[k]=++cnt;
    int ans=0;
    for(i=1 ; i<=n ; i++){
        int lef=1;
        int rig=n;
        int k=0;
        while(rig>=lef){
            int mid=(lef+rig)/2;
            if(f(1,n,mp1[a[i].y],tree[mid])<=mp2[a[i].z]){
                k=mid;
                lef=mid+1;
            }
            else
                rig=mid-1;
        }
        ans=max(ans,k+1);
        upd(1,n,mp1[a[i].y],mp2[a[i].z],tree[k+1]);
    }
    cout<<ans;
    return 0;
}

Compilation message

matrix.cpp: In function 'int main()':
matrix.cpp:57:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for(auto k: S1)mp1[k]=++cnt;cnt=0;
     ^~~
matrix.cpp:57:33: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
     for(auto k: S1)mp1[k]=++cnt;cnt=0;
                                 ^~~
matrix.cpp:43:11: warning: unused variable 'j' [-Wunused-variable]
     int i,j;
           ^

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 32 ms 2808 KB Output is correct
2 Correct 27 ms 2552 KB Output is correct
3 Correct 28 ms 2532 KB Output is correct
4 Correct 26 ms 2552 KB Output is correct
5 Correct 39 ms 2680 KB Output is correct
6 Correct 25 ms 3368 KB Output is correct
7 Correct 26 ms 2680 KB Output is correct

Subtask #2
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 35 ms 3420 KB Output is correct
2 Correct 34 ms 3580 KB Output is correct
3 Correct 44 ms 3532 KB Output is correct
4 Correct 45 ms 3704 KB Output is correct
5 Correct 38 ms 3576 KB Output is correct
6 Correct 33 ms 4360 KB Output is correct
7 Correct 46 ms 3704 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 32 ms 2808 KB Output is correct
2 Correct 27 ms 2552 KB Output is correct
3 Correct 28 ms 2532 KB Output is correct
4 Correct 26 ms 2552 KB Output is correct
5 Correct 39 ms 2680 KB Output is correct
6 Correct 25 ms 3368 KB Output is correct
7 Correct 26 ms 2680 KB Output is correct
8 Correct 1299 ms 51744 KB Output is correct
9 Correct 1139 ms 49748 KB Output is correct
10 Correct 998 ms 46072 KB Output is correct
11 Correct 675 ms 33248 KB Output is correct
12 Correct 1048 ms 47620 KB Output is correct
13 Correct 906 ms 70036 KB Output is correct
14 Correct 1028 ms 45808 KB Output is correct
15 Correct 723 ms 33160 KB Output is correct
16 Correct 910 ms 70248 KB Output is correct
17 Correct 965 ms 70112 KB Output is correct
18 Correct 911 ms 50780 KB Output is correct
19 Correct 947 ms 44952 KB Output is correct
20 Correct 1310 ms 52068 KB Output is correct

Subtask #4
62.0 / 62.0

# Verdict Execution time Memory Grader output
1 Correct 35 ms 3420 KB Output is correct
2 Correct 34 ms 3580 KB Output is correct
3 Correct 44 ms 3532 KB Output is correct
4 Correct 45 ms 3704 KB Output is correct
5 Correct 38 ms 3576 KB Output is correct
6 Correct 33 ms 4360 KB Output is correct
7 Correct 46 ms 3704 KB Output is correct
8 Correct 1441 ms 63204 KB Output is correct
9 Correct 1396 ms 54100 KB Output is correct
10 Correct 1385 ms 67416 KB Output is correct
11 Correct 1443 ms 90820 KB Output is correct
12 Correct 1409 ms 53996 KB Output is correct
13 Correct 1462 ms 63640 KB Output is correct
14 Correct 1696 ms 65756 KB Output is correct
15 Correct 1423 ms 90028 KB Output is correct
16 Correct 1411 ms 90104 KB Output is correct
17 Correct 1616 ms 53904 KB Output is correct
18 Correct 2303 ms 67140 KB Output is correct
19 Correct 1573 ms 53956 KB Output is correct
20 Correct 1593 ms 64240 KB Output is correct
21 Correct 1408 ms 90152 KB Output is correct
22 Correct 2188 ms 68088 KB Output is correct
23 Correct 1387 ms 54056 KB Output is correct
24 Correct 1501 ms 54100 KB Output is correct
25 Correct 1882 ms 67316 KB Output is correct
26 Correct 1690 ms 54152 KB Output is correct
27 Correct 1428 ms 53980 KB Output is correct
28 Correct 1431 ms 90036 KB Output is correct
29 Correct 1416 ms 54012 KB Output is correct
30 Correct 1412 ms 54000 KB Output is correct
31 Correct 1750 ms 54276 KB Output is correct
32 Correct 1456 ms 54024 KB Output is correct