Submission #245464

#	Time	Username	Problem	Language	Result	Execution time	Memory
245464		mhy908	Tenis (COI19_tenis)	C++14	100 / 100	281 ms	6776 KiB

tenis

#include <bits/stdc++.h>
#define mp make_pair
#define F first
#define S second
using namespace std;
typedef pair<int, int> pii;

int n, q;
struct NODE{
    int p, l;
}tree[400010];
void prop(int nd, int s, int e){
    tree[nd].p+=tree[nd].l;
    if(s!=e){
        tree[nd*2].l+=tree[nd].l;
        tree[nd*2+1].l+=tree[nd].l;
    }
    tree[nd].l=0;
}
void alter(int nd, int s, int e, int a, int b, int val){
    if(e<a||s>b||a>b)return;
    if(a<=s&&e<=b){
        tree[nd].l+=val;
        return;
    }
    prop(nd, s, e);
    alter(nd*2, s, (s+e)/2, a, b, val);
    alter(nd*2+1, (s+e)/2+1, e, a, b, val);
    tree[nd].p=min(tree[nd*2].p+tree[nd*2].l, tree[nd*2+1].p+tree[nd*2+1].l);
}
int query(int nd, int s, int e){
    prop(nd, s, e);
    if(tree[nd].p)return 0;
    if(s==e)return s;
    int ret=query(nd*2, s, (s+e)/2);
    if(ret)return ret;
    return query(nd*2+1, (s+e)/2+1, e);
}
int arr[100010];
pii rnk[100010];
int main(){
    scanf("%d %d", &n, &q);
    for(int i=1; i<=n; i++){
        int a;
        scanf("%d", &a);
        arr[a]=i;
    }
    for(int i=1; i<=n; i++){
        int a;
        scanf("%d", &a);
        rnk[arr[a]].F=i;
        alter(1, 1, n, min(arr[a], i), max(arr[a], i)-1, 1);
    }
    for(int i=1; i<=n; i++){
        int a;
        scanf("%d", &a);
        rnk[arr[a]].S=i;
        alter(1, 1, n, min(arr[a], i), max(arr[a], i)-1, 1);
    }
    for(int i=1; i<=q; i++){
        int qu;
        scanf("%d", &qu);
        if(qu==1){
            int a;
            scanf("%d", &a);
            if(query(1, 1, n)>=arr[a])puts("DA");
            else puts("NE");
        }
        else{
            int a, b, c;
            scanf("%d %d %d", &a, &b, &c);
            if(a==1){
                alter(1, 1, n, min(arr[b], rnk[arr[b]].F), max(arr[b], rnk[arr[b]].F)-1, -1);
                alter(1, 1, n, min(arr[b], rnk[arr[b]].S), max(arr[b], rnk[arr[b]].S)-1, -1);
                alter(1, 1, n, min(arr[c], rnk[arr[c]].F), max(arr[c], rnk[arr[c]].F)-1, -1);
                alter(1, 1, n, min(arr[c], rnk[arr[c]].S), max(arr[c], rnk[arr[c]].S)-1, -1);
                swap(rnk[arr[b]], rnk[arr[c]]);
                swap(arr[b], arr[c]);
                alter(1, 1, n, min(arr[b], rnk[arr[b]].F), max(arr[b], rnk[arr[b]].F)-1, 1);
                alter(1, 1, n, min(arr[b], rnk[arr[b]].S), max(arr[b], rnk[arr[b]].S)-1, 1);
                alter(1, 1, n, min(arr[c], rnk[arr[c]].F), max(arr[c], rnk[arr[c]].F)-1, 1);
                alter(1, 1, n, min(arr[c], rnk[arr[c]].S), max(arr[c], rnk[arr[c]].S)-1, 1);
            }
            if(a==2){
                alter(1, 1, n, min(arr[b], rnk[arr[b]].F), max(arr[b], rnk[arr[b]].F)-1, -1);
                alter(1, 1, n, min(arr[c], rnk[arr[c]].F), max(arr[c], rnk[arr[c]].F)-1, -1);
                swap(rnk[arr[b]].F, rnk[arr[c]].F);
                alter(1, 1, n, min(arr[b], rnk[arr[b]].F), max(arr[b], rnk[arr[b]].F)-1, 1);
                alter(1, 1, n, min(arr[c], rnk[arr[c]].F), max(arr[c], rnk[arr[c]].F)-1, 1);
            }
            if(a==3){
                alter(1, 1, n, min(arr[b], rnk[arr[b]].S), max(arr[b], rnk[arr[b]].S)-1, -1);
                alter(1, 1, n, min(arr[c], rnk[arr[c]].S), max(arr[c], rnk[arr[c]].S)-1, -1);
                swap(rnk[arr[b]].S, rnk[arr[c]].S);
                alter(1, 1, n, min(arr[b], rnk[arr[b]].S), max(arr[b], rnk[arr[b]].S)-1, 1);
                alter(1, 1, n, min(arr[c], rnk[arr[c]].S), max(arr[c], rnk[arr[c]].S)-1, 1);
            }
        }
    }
}

Compilation message (stderr)

tenis.cpp: In function 'int main()':
tenis.cpp:42:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &q);
     ~~~~~^~~~~~~~~~~~~~~~~
tenis.cpp:45:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &a);
         ~~~~~^~~~~~~~~~
tenis.cpp:50:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &a);
         ~~~~~^~~~~~~~~~
tenis.cpp:56:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &a);
         ~~~~~^~~~~~~~~~
tenis.cpp:62:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &qu);
         ~~~~~^~~~~~~~~~~
tenis.cpp:65:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d", &a);
             ~~~~~^~~~~~~~~~
tenis.cpp:71:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d %d %d", &a, &b, &c);
             ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 11 / 11
• Subtask 3: 12 / 12
• Subtask 4: 21 / 21
• Subtask 5: 49 / 49