Submission #620891

#	Time	Username	Problem	Language	Result	Execution time	Memory
620891		balbit	Wall (IOI14_wall)	C++14	100 / 100	756 ms	124424 KiB

wall

#include "wall.h"
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define pii pair<ll, ll>
#define f first
#define s second

#define FOR(i,a,b) for (int i = a; i<b; ++i)
#define REP(i,n) FOR(i,0,n)
#define REP1(i,n) FOR(i,1,n+1)

#define MX(a,b) a = max(a,b)
#define MN(a,b) a = min(a,b)

#define SZ(x) (int)(x).size()
#define ALL(x) (x).begin(), (x).end()
#define pb push_back

#ifdef BALBIT
#define bug(...) cerr<<"#"<<__LINE__<<": "<<#__VA_ARGS__<<"- ", _do(__VA_ARGS__)
template<typename T> void _do(T && x) {cerr<<x<<endl;}
template<typename T, typename ...S> void _do(T && x, S && ...y) {cerr<<x<<", "; _do(y...);}
#else
#define bug(...)
#define endl '\n'
#endif

const ll inf = 0x3f3f3f3f3f3f3f3f;
const int iinf = 0x3f3f3f3f;
const int maxn = 5e5+5;

struct rng{
    int l,r;
    inline int eval(int x) {
        return x<l?l:(x>r?r:x);
    }
    rng(){
        l=0,r=100000;
    }
    rng(int a, int b):l(a),r(b){}
};

inline rng mrg(rng a, rng b) {
    return {b.eval(a.l), b.eval(a.r)};
}

rng seg[maxn*4];

void MO(int p, rng to, int o=1, int l=0, int r=maxn-1) {
    if (l > p || r < p) return;
    if (l==r) {
        seg[o] = to; return;
    }
    int mid = (l+r)/2;
    MO(p,to,o*2,l,mid); MO(p,to,o*2+1,mid+1,r);
    seg[o] = mrg(seg[o*2], seg[o*2+1]);
}

vector<pair<int, rng> > work[maxn*4]; //what to do at these positions

void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[]){
    REP(i,k) {
        rng bro = op[i]==1?rng{height[i],100000} : rng{0,height[i]};
        work[left[i]].pb({i, bro});
        work[right[i]+1].pb({i, rng()});
    }

    REP(i,n) {
        for (auto &e : work[i]) {
            MO(e.f, e.s);
        }
        bug(i, seg[1].l, seg[1].r);
        finalHeight[i] = seg[1].l;
    }
}

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