Submission #93391

#	Time	Username	Problem	Language	Result	Execution time	Memory
93391		RezwanArefin01	Cake (CEOI14_cake)	C++17	0 / 100	249 ms	9592 KiB

cake

///usr/bin/g++ -O2 $0 -o ${0%.cpp} && echo "----------" && ./${0%.cpp}; exit;
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> ii; 

const int N = 2e5 + 10; 

struct tree {
    vector<int> bit;
    int N, lg;
    void init(int n) { 
        N = n; lg = log2(N) + 1; 
        bit = vector<int> (n + 1,  0); 
    }
    void update(int x, int v) {
        for(; x <= N; x += x & -x) 
            bit[x] = max(bit[x], v); 
    }
    int query(int x) { int ret = 0;  
        for(; x > 0; x -= x & -x) 
            ret = max(ret, bit[x]); 
        return ret; 
    }
    int get(int X) {
        int pos = 0, cur = 0;
        for(int i = lg; i >= 0; i--) if(pos + (1 << i) <= N) {
            if(max(cur, bit[pos + (1 << i)]) <= X) {
                cur = max(cur, bit[pos + (1 << i)]); 
                pos |= 1 << i;
            }
        } return pos; 
    }
} t1, t2;

int n, a, d[N], p[20]; 

int main() {
    scanf("%d %d", &n, &a);  
    for(int i = 1; i <= n; i++) {
        scanf("%d", &d[i]); 
        if(d[i] > n - 10) 
            p[n - d[i] + 1] = i; 
    }
    
    int n1 = a, n2 = n - a + 1; 
    t1.init(n1); t2.init(n2); 

    auto upd = [&](int i, int x) {
        if(i <= a) t1.update(a - i + 1, x);
        if(i >= a) t2.update(i - a + 1, x);
    };
    
    for(int i = 1; i <= n; i++) upd(i, d[i]); 

    int q; scanf("%d", &q); while(q--) {
        char c; int x, e; 
        scanf(" %c", &c); 
        if(c == 'E') {
            scanf("%d %d", &x, &e); 
            d[x] = d[p[e]]; 
            for(int i = 10 ; i > e; i--) 
                p[i] = p[i - 1]; 
            p[e] = x;
            for(int i = e; i >= 1; i--) 
                upd(p[i], ++d[p[i]]); 
        } else {
            scanf("%d", &x); 
            int X; 
            if(x == a) { puts("0"); continue; }
            if(x < a) X = t2.get(t1.query(a - x + 1));  
            else      X = t1.get(t2.query(x - a + 1));  
            printf("%d\n", abs(x - a) + X - 1); 
        }
    }
}

Compilation message (stderr)

cake.cpp: In function 'int main()':
cake.cpp:40:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &a);  
     ~~~~~^~~~~~~~~~~~~~~~~
cake.cpp:42:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &d[i]); 
         ~~~~~^~~~~~~~~~~~~
cake.cpp:57:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     int q; scanf("%d", &q); while(q--) {
            ~~~~~^~~~~~~~~~
cake.cpp:59:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf(" %c", &c); 
         ~~~~~^~~~~~~~~~~
cake.cpp:61:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d %d", &x, &e); 
             ~~~~~^~~~~~~~~~~~~~~~~
cake.cpp:69:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d", &x); 
             ~~~~~^~~~~~~~~~

• Subtask 1: 0 / 15
• Subtask 2: 0 / 15
• Subtask 3: 0 / 20
• Subtask 4: 0 / 50