Submission #995078

#	Time	Username	Problem	Language	Result	Execution time	Memory
995078		wood	Wall (IOI14_wall)	C++17	24 / 100	575 ms	42836 KiB

wall

#include "wall.h"
#include <bits/stdc++.h>  
using namespace std;
 
typedef long long ll;
typedef pair<int,int> p32;
typedef pair<ll,ll> p64;
#define pb push_back
#define eb emplace_back
#define fi first
#define se second
#define vi vector<int>
#define vp32 vector<p32>
#define fast_cin() ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL)
#define MOD %1000000007
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
template <class T>
using Tree =
    tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
//never guess
//never debug without reviewing code
//never try adding ones or substracting them
//only step by step debug when necessay

#ifdef _WIN32
   constexpr int N = 1e2;
#else
   constexpr int N = 1e6;
#endif

struct segtree
{
    ll size = 1, val[N] = {0};
    p64 ops[N];
    const p64 neutral = p32(INT_MIN,INT_MAX);
    segtree(int n){ while(size<n) size*=2;fill(ops,ops+N,neutral);}

    void merge(p64& a, p64& b){
        a.fi = max(a.fi,b.fi);
        a.se = min(a.se,b.se);
    }
    void propagate(int x, int s){
        if(s==1){
            val[x] = max(val[x],ops[x].fi);
            val[x] = min(val[x],ops[x].se);
        }
        else{
            merge(ops[2*x+1],ops[x]);
            merge(ops[2*x+2],ops[x]);
        }
        ops[x] = neutral;
    }
    void set(int l, int r, p64 u){
        set(l,r,u,0,0,size);
    }
    void set(int l, int r,p64 u, int x, int lx, int rx){
        propagate(x,rx-lx);
        if(rx<=l||lx>=r) return;
        else if(rx<=r&&lx>=l){
            merge(ops[x],u);
            return;
        }
        int m = (rx+lx)/2;
        set(l,r,u,2*x+1,lx,m);
        set(l,r,u,2*x+2,m,rx);
        propagate(2*x+1,m-lx);
        propagate(2*x+2,m-lx);
    }

    int get(int i){
        return get(i,0,0,size);
    }
    int get(int i, int x, int lx, int rx){
        propagate(x,rx-lx);
        if(rx-lx==1) return val[x];
        int m = (rx+lx)/2;
        propagate(2*x+1,m-lx);
        propagate(2*x+2,m-lx);
        if(i<m) return get(i,2*x+1,lx,m);
        else return get(i,2*x+2,m,rx);
    }
};


void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[]){
    segtree sgt(n);
    for (size_t i = 0; i < k; i++)
    {
        p64 o; if(op[i]==1) o = p64((ll)height[i],(ll)INT_MAX);
        else o = p64((ll)INT_MIN,(ll)height[i]);
        sgt.set(left[i],right[i]+1,o);
    }
    for (size_t i = 0; i < n ; i++)
    {
        finalHeight[i] = sgt.get(i);
    }
}

#ifdef _WIN32
signed main()
{
    int n;
    int k;

    int i, j;  
    int status = 0;
        freopen("sample-2.in", "r", stdin);
        freopen("input.out", "w", stdout);
        cin>>n>>k;

    int* op = (int*)calloc(sizeof(int), k);
    int* left = (int*)calloc(sizeof(int), k);
    int* right = (int*)calloc(sizeof(int), k);
    int* height = (int*)calloc(sizeof(int), k);
    int* finalHeight = (int*)calloc(sizeof(int), n);

    for (i = 0; i < k; i++){
        status = scanf("%d%d%d%d", &op[i], &left[i], &right[i], &height[i]);
        assert(status == 4);
    }

    buildWall(n, k, op, left, right, height, finalHeight);

    for (j = 0; j < n; j++)
        printf("%d\n", finalHeight[j]);
    
    return 0;
}
/*
10 6
1 1 8 4
2 4 9 1
2 3 6 5
1 0 5 3
1 2 2 5
2 6 7 0
*/
#endif

Compilation message (stderr)

wall.cpp: In function 'void buildWall(int, int, int*, int*, int*, int*, int*)':
wall.cpp:88:26: warning: comparison of integer expressions of different signedness: 'size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   88 |     for (size_t i = 0; i < k; i++)
      |                        ~~^~~
wall.cpp:94:26: warning: comparison of integer expressions of different signedness: 'size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   94 |     for (size_t i = 0; i < n ; i++)
      |                        ~~^~~

• Subtask 1: 0 / 8
• Subtask 2: 24 / 24
• Subtask 3: 0 / 29
• Subtask 4: 0 / 39