oj.uz

답안 #92811

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
92811 2019-01-05T04:41:59 Z Retro3014 Sails (IOI07_sails) C++17
100 / 100
 982 ms 9188 KB 
#include <iostream>
#include <algorithm>
#include <vector>
#include <deque>

using namespace std;
#define MAX_N 100000
#define INF 100000
typedef long long ll;

struct S{
    int min, max, lazy;
    int s, e;
    int l, r;
};
vector<S> seg;
int N;
struct M{
    int h, k;
    bool operator <(const M &a)const{
        return h<a.h;
    }
};
vector<M> m;

deque<int> dq;


void init(){
    dq.push_back(0);
    int x=0;
    while(!dq.empty()){
        x=dq.front(); dq.pop_front();
        if(seg[x].s!=seg[x].e){
            if(seg[x].l==-1){
                seg[x].l=(int)seg.size();
                seg.push_back({0, 0, 0, seg[x].s, (seg[x].s+seg[x].e)/2, -1, -1});
                dq.push_back(seg[x].l);
            }
            if(seg[x].r==-1){
                seg[x].r=(int)seg.size();
                seg.push_back({0, 0, 0, (seg[x].s+seg[x].e)/2+1, seg[x].e, -1, -1});
                dq.push_back(seg[x].r);
            }
        }
    }
}

void calc1(int idx){
    if(seg[idx].lazy>0){
        if(seg[idx].l!=-1){
            seg[seg[idx].l].max+=seg[idx].lazy; seg[seg[idx].l].min+=seg[idx].lazy; seg[seg[idx].l].lazy+=seg[idx].lazy;
        }
        if(seg[idx].r!=-1){
            seg[seg[idx].r].max+=seg[idx].lazy; seg[seg[idx].r].min+=seg[idx].lazy; seg[seg[idx].r].lazy+=seg[idx].lazy;
        }
        seg[idx].lazy=0;
    }
}

void update(int idx, int x, int y){
    if(seg[idx].lazy>0){
        if(seg[idx].l!=-1){
            seg[seg[idx].l].max+=seg[idx].lazy; seg[seg[idx].l].min+=seg[idx].lazy; seg[seg[idx].l].lazy+=seg[idx].lazy;
        }
        if(seg[idx].r!=-1){
            seg[seg[idx].r].max+=seg[idx].lazy; seg[seg[idx].r].min+=seg[idx].lazy; seg[seg[idx].r].lazy+=seg[idx].lazy;
        }
        seg[idx].lazy=0;
    }
    if(seg[idx].s>y || seg[idx].e<x)    return;
    if(seg[idx].s>=x && seg[idx].e<=y)  {
        seg[idx].lazy++; seg[idx].max++; seg[idx].min++;     return;
    }
    update(seg[idx].l, x, y);
    update(seg[idx].r, x, y);
    seg[idx].max=max(seg[seg[idx].l].max, seg[seg[idx].r].max);
    seg[idx].min=min(seg[seg[idx].l].min, seg[seg[idx].r].min);
}

int mini(int x, int y){
    dq.push_back(0); int idx, ret=INF;
    while(!dq.empty()){
        idx=dq.front(); dq.pop_front();
        if(seg[idx].lazy>0){
            if(seg[idx].l!=-1){
                seg[seg[idx].l].max+=seg[idx].lazy; seg[seg[idx].l].min+=seg[idx].lazy; seg[seg[idx].l].lazy+=seg[idx].lazy;
            }
            if(seg[idx].r!=-1){
                seg[seg[idx].r].max+=seg[idx].lazy; seg[seg[idx].r].min+=seg[idx].lazy; seg[seg[idx].r].lazy+=seg[idx].lazy;
            }
            seg[idx].lazy=0;
        }
        if(!(seg[idx].s>y || seg[idx].e<x)){
            if(seg[idx].s>=x && seg[idx].e<=y)  ret=min(ret, seg[idx].min);
            else{dq.push_back(seg[idx].l); dq.push_back(seg[idx].r);}
        }
    }
    return ret;
}

int maxi(int x, int y){
    dq.push_back(0); int ret=0, idx;
    while(!dq.empty()){
        idx=dq.front(); dq.pop_front();
        if(seg[idx].lazy>0){
            if(seg[idx].l!=-1){
                seg[seg[idx].l].max+=seg[idx].lazy; seg[seg[idx].l].min+=seg[idx].lazy; seg[seg[idx].l].lazy+=seg[idx].lazy;
            }
            if(seg[idx].r!=-1){
                seg[seg[idx].r].max+=seg[idx].lazy; seg[seg[idx].r].min+=seg[idx].lazy; seg[seg[idx].r].lazy+=seg[idx].lazy;
            }
            seg[idx].lazy=0;
        }
        if(!(seg[idx].s>y || seg[idx].e<x)){
            if(seg[idx].s>=x && seg[idx].e<=y)  ret=max(ret, seg[idx].max);
            else{
                dq.push_back(seg[idx].l); dq.push_back(seg[idx].r);
            }
        }
    }
    return ret;
}


int get(int x){
    dq.push_back(0);
    int idx=0;
    while(!dq.empty()){
        idx=dq.front(); dq.pop_front();
        if(seg[idx].lazy>0){
            if(seg[idx].l!=-1){
                seg[seg[idx].l].max+=seg[idx].lazy; seg[seg[idx].l].min+=seg[idx].lazy; seg[seg[idx].l].lazy+=seg[idx].lazy;
            }
            if(seg[idx].r!=-1){
                seg[seg[idx].r].max+=seg[idx].lazy; seg[seg[idx].r].min+=seg[idx].lazy; seg[seg[idx].r].lazy+=seg[idx].lazy;
            }
            seg[idx].lazy=0;
        }
        if(seg[idx].s==seg[idx].e)  return seg[idx].max;
        if((seg[idx].s+seg[idx].e)/2>=x){
            dq.push_back(seg[idx].l);
        }else   dq.push_back(seg[idx].r);
    }
    return 0;
}

int find_l(int x, int y, int t){
    int s=x, e=y, mid;
    while(s<e){
        mid=(s+e)/2;
        if(get(mid)==t){
            e=mid;
        }else{
            s=mid+1;
        }
    }
    return s;
}
int find_r(int x, int y, int t){
    int s=x, e=y, mid;
    while(s<e){
        mid=(s+e)/2+1;
        if(get(mid)==t){
            s=mid;
        }else   e=mid-1;
    }
    return s;
}


int main(){
    //freopen("in.txt", "r", stdin);
    scanf("%d", &N);
    int MH=0;
    for(int i=1; i<=N; i++){
        int a, b;
        scanf("%d%d", &a, &b); m.push_back({a, b});
        MH=max(MH, a);
    } sort(m.begin(), m.end());
    seg.push_back({0, 0, 0, 1, MH, -1, -1});
    init();
    int l, r, s, e, t;
    ll ans=0;
    for(int i=0; i<N; i++){
        e=m[i].h; s=m[i].h-m[i].k+1;
        t=get(s);
        l=find_l(1, s, t);
        r=find_r(s, e, t);
        //printf("%d %d %d %d %d\n", s, e, l, r, t);
        if(l==s)    update(0, s, e);
        else{
            update(0, l, l+r-s);
            update(0, r+1, e);
        }
    }
    for(int i=0; i<seg.size(); i++){
        if(seg[i].s==seg[i].e){
            ans+=((ll)seg[i].max)*(seg[i].max-1)/2;
        }else{
            if(seg[i].lazy>0){
                seg[seg[i].l].max+=seg[i].lazy; seg[seg[i].l].min+=seg[i].lazy; seg[seg[i].l].lazy+=seg[i].lazy;
                seg[seg[i].r].max+=seg[i].lazy; seg[seg[i].r].min+=seg[i].lazy; seg[seg[i].r].lazy+=seg[i].lazy;
                seg[i].lazy=0;
            }
        }
    }
    printf("%lld\n", ans);
    return 0;
}

Compilation message

sails.cpp: In function 'int main()':
sails.cpp:197:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0; i<seg.size(); i++){
                  ~^~~~~~~~~~~
sails.cpp:174:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &N);
     ~~~~~^~~~~~~~~~
sails.cpp:178:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d", &a, &b); m.push_back({a, b});
         ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 256 KB Output is correct

Subtask #3
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 376 KB Output is correct

Subtask #4
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 3 ms 376 KB Output is correct

Subtask #5
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 760 KB Output is correct
2 Correct 23 ms 7792 KB Output is correct

Subtask #6
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 55 ms 2348 KB Output is correct
2 Correct 123 ms 924 KB Output is correct

Subtask #7
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 103 ms 2420 KB Output is correct

Subtask #8
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 374 ms 4476 KB Output is correct

Subtask #9
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 836 ms 9036 KB Output is correct
2 Correct 610 ms 9100 KB Output is correct

Subtask #10
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 656 ms 9060 KB Output is correct
2 Correct 295 ms 9180 KB Output is correct

Subtask #11
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 982 ms 9188 KB Output is correct
2 Correct 451 ms 4840 KB Output is correct