Submission #132813

#	Time	Username	Problem	Language	Result	Execution time	Memory
132813		ae04071	New Home (APIO18_new_home)	C++11	0 / 100	1165 ms	76856 KiB

new_home

#include <bits/stdc++.h>
#define fi first
#define se second
#define sz(x) ((int)(x).size())
using namespace std;
using lli = long long;
using pii = pair<int,int>;
using pli = pair<lli,int>;
using pll = pair<lli,lli>;

const int MAX = 1e8;

int n,m,q;
vector<pair<int,pii>> ti_a[300001];
vector<pair<int,pii>> init() {
    vector<pair<int,pii>> ret;
    for(int i=1;i<=m;i++) {
        sort(ti_a[i].begin(),ti_a[i].end());
        for(int j=0,k=0;j<sz(ti_a[i]);j=k) {
            int mx = ti_a[i][j].se.se, mn = ti_a[i][j].se.fi;
            for(k=j;k<sz(ti_a[i]) && ti_a[i][j].fi == ti_a[i][k].fi && 
                    ti_a[i][k].se.fi<=mx+1;k++) mx = max(mx, ti_a[i][k].se.se);
            //printf("%d %d\n",ti_a[i][j].fi, ti_a[i][k].fi);
            //printf("#%d : %d %d %d\n",i,mn,mx,k);
            ret.push_back({mn, pii(ti_a[i][j].fi, i)});
            ret.push_back({mx+1, pii(ti_a[i][j].fi, -i)});
        }
    }
    return ret;
}

set<int> pt[300001];
set<pair<int,pii>> rs;
int ac;

void ins(int i,int pos) {
    auto &tr=pt[i];
    if(tr.empty()) {
        ac++;
        rs.insert({pos,pii(i,-1)});
        rs.insert({pos,pii(i,1)});
    } else {
        if(*tr.begin() > pos) {
            rs.erase({*tr.begin(), pii(i, -1)});
            rs.insert({pos, pii(i,-1)});
        }
        if(*prev(tr.end()) < pos) {
            rs.erase({*prev(tr.end()), pii(i,1)});
            rs.insert({pos, pii(i,1)});
        }
    }
    tr.insert(pos);
}
void del(int i,int pos) {
    auto &tr = pt[i];
    if(sz(tr)==1) {
        rs.erase({*tr.begin(), pii(i,-1)});
        rs.erase({*tr.begin(), pii(i,1)});
        ac--;
        tr.erase(tr.begin());
    } else {
        if(*tr.begin() == pos) {
            rs.erase({*tr.begin(), pii(i,-1)});
            rs.insert({*next(tr.begin()), pii(i,-1)});
        }
        if(*prev(tr.end()) == pos) {
            rs.erase({*prev(tr.end()), pii(i,1)});
            rs.insert({*prev(prev(tr.end())), pii(i,1)});
        }
        tr.erase(pos);
    }
}
int get(int pos) {
    if(ac < m) return -1;
    else return max(pos - rs.begin()->fi, prev(rs.end())->fi - pos);
}

int ans[300001];
int main() {
    scanf("%d%d%d",&n,&m,&q);
    for(int i=0;i<n;i++) {
        int x,t,a,b;
        scanf("%d%d%d%d",&x,&t,&a,&b);
        ti_a[t].push_back({x,pii(a,b)});
    }

    vector<pair<int,pii>> sa = init(),qa;
    for(int i=0;i<q;i++) {
        int t,x;
        scanf("%d%d",&x,&t);
        qa.push_back({t, pii(x, i)});
    }
    sort(qa.begin(),qa.end());
    sort(sa.begin(),sa.end());

    //for(auto &it:sa) printf("(%d %d %d) ",it.fi,it.se.fi,it.se.se);
    //puts("");

    for(int i=0,j=0;i<q;i++) {
        for(;j<sz(sa) && sa[j].fi <= qa[i].fi;j++) {
            if(sa[j].se.se<0) del(-sa[j].se.se, sa[j].se.fi);
            else ins(sa[j].se.se, sa[j].se.fi);
        }
        if(ac < m) ans[qa[i].se.se] = -1;
        else ans[qa[i].se.se] = get(qa[i].se.fi);
    }

    for(int i=0;i<q;i++) printf("%d\n",ans[i]);

    return 0;
}

Compilation message (stderr)

new_home.cpp: In function 'int main()':
new_home.cpp:80:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d%d",&n,&m,&q);
     ~~~~~^~~~~~~~~~~~~~~~~~~
new_home.cpp:83:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d%d%d",&x,&t,&a,&b);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
new_home.cpp:90:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d",&x,&t);
         ~~~~~^~~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 7
• Subtask 3: 0 / 10
• Subtask 4: 0 / 23
• Subtask 5: 0 / 35
• Subtask 6: 0 / 20