oj.uz

답안 #259231

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
259231 2020-08-07T12:37:02 Z 문홍윤(#5063) 별자리 (JOI12_constellation) C++17
100 / 100
 72 ms 7452 KB 
#include <bits/stdc++.h>
#define eb emplace_back
#define mp make_pair
#define F first
#define S second
using namespace std;
typedef long long LL;
typedef pair<LL, LL> pll;
const LL mod1=1e9+7;

pll operator-(pll a, pll b){return mp(a.F-b.F, a.S-b.S);}
LL ccw(pll a, pll b){return a.F*b.S-a.S*b.F;}

int n;
pair<pll, int> p[100010];
vector<int> uh, dh;
int arr[200010], re, sum1[200010], sum2[200010];
int qn, on, tn, h0, h1, h2;
LL ret;


int main(){
    scanf("%d", &n);
    for(int i=1; i<=n; i++){
        scanf("%lld %lld %d", &p[i].F.F, &p[i].F.S, &p[i].S);
        if(p[i].S==0)qn++;
        if(p[i].S==1)on++;
        if(p[i].S==2)tn++;
    }
    sort(p+1, p+n+1);
    dh.eb(1); dh.eb(2);
    for(int i=3; i<=n; i++){
        while(dh.size()>1){
            int p1=dh[dh.size()-2], p2=dh[dh.size()-1];
            if(ccw(p[p2].F-p[p1].F, p[i].F-p[p2].F)>0)break;
            dh.pop_back();
        }
        dh.eb(i);
    }
    uh.eb(n); uh.eb(n-1);
    for(int i=n-2; i>=1; i--){
        while(uh.size()>1){
            int p1=uh[uh.size()-2], p2=uh[uh.size()-1];
            if(ccw(p[p2].F-p[p1].F, p[i].F-p[p2].F)>0)break;
            uh.pop_back();
        }
        uh.eb(i);
    }
    for(int i=0; i<dh.size()-1; i++)arr[re++]=p[dh[i]].S;
    for(int i=0; i<uh.size()-1; i++)arr[re++]=p[uh[i]].S;
    for(int i=0; i<re; i++){
        if(arr[i]==0)h0++;
        if(arr[i]==1)h1++;
        if(arr[i]==2)h2++;
    }
    for(int i=0; i<dh.size()-1; i++)arr[re++]=p[dh[i]].S;
    for(int i=0; i<uh.size()-1; i++)arr[re++]=p[uh[i]].S;
    for(int i=0; i<re; i++){
        if(i)sum1[i]=sum1[i-1], sum2[i]=sum2[i-1];
        if(arr[i]==1)sum1[i]++;
        if(arr[i]==2)sum2[i]++;
        //printf("%d -%d\n", sum1[i], sum2[i]);
    }
    for(int i=0; i<re/2; i++){
        int nw1=0, nw2=0;
        if(i)nw1=sum1[i-1], nw2=sum2[i-1];
        int f1=lower_bound(sum1, sum1+re, nw1+h1)-sum1;
        int f2=lower_bound(sum2, sum2+re, nw2+1)-sum2;
        //printf("! %d %d\n", f1, f2);
        int tmp=min(i+re/2-1, f2)-max(i, f1);
        if(tmp>0){ret+=tmp; ret%=mod1;}
    }
    //printf("!!%lld\n", ret);
    if(!h1)ret++;
    if(!h2)ret++;
    for(int i=1; i<=qn-h0; i++){ret*=2ll; ret%=mod1;}
    if(!on)ret--;
    if(!tn)ret--;
    printf("%lld", (ret+mod1)%mod1);
}

Compilation message

constellation.cpp: In function 'int main()':
constellation.cpp:49:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0; i<dh.size()-1; i++)arr[re++]=p[dh[i]].S;
                  ~^~~~~~~~~~~~
constellation.cpp:50:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0; i<uh.size()-1; i++)arr[re++]=p[uh[i]].S;
                  ~^~~~~~~~~~~~
constellation.cpp:56:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0; i<dh.size()-1; i++)arr[re++]=p[dh[i]].S;
                  ~^~~~~~~~~~~~
constellation.cpp:57:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0; i<uh.size()-1; i++)arr[re++]=p[uh[i]].S;
                  ~^~~~~~~~~~~~
constellation.cpp:23:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~
constellation.cpp:25:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lld %lld %d", &p[i].F.F, &p[i].F.S, &p[i].S);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct

Subtask #3
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 320 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct

Subtask #4
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct

Subtask #5
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct

Subtask #6
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 3 ms 768 KB Output is correct
3 Correct 4 ms 768 KB Output is correct
4 Correct 4 ms 768 KB Output is correct
5 Correct 3 ms 512 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 3 ms 640 KB Output is correct
8 Correct 5 ms 640 KB Output is correct
9 Correct 4 ms 768 KB Output is correct

Subtask #7
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 71 ms 2944 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 60 ms 4728 KB Output is correct
5 Correct 65 ms 7412 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 3 ms 768 KB Output is correct
8 Correct 4 ms 768 KB Output is correct
9 Correct 5 ms 768 KB Output is correct
10 Correct 69 ms 7452 KB Output is correct

Subtask #8
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 57 ms 2936 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 61 ms 4836 KB Output is correct
5 Correct 72 ms 7412 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 4 ms 768 KB Output is correct
8 Correct 4 ms 768 KB Output is correct
9 Correct 4 ms 768 KB Output is correct
10 Correct 62 ms 7412 KB Output is correct

Subtask #9
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 58 ms 4728 KB Output is correct
3 Correct 61 ms 7416 KB Output is correct
4 Correct 70 ms 7412 KB Output is correct
5 Correct 71 ms 5748 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 4 ms 640 KB Output is correct
8 Correct 3 ms 640 KB Output is correct
9 Correct 4 ms 640 KB Output is correct
10 Correct 61 ms 5364 KB Output is correct
11 Correct 60 ms 5364 KB Output is correct

Subtask #10
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 57 ms 2680 KB Output is correct
3 Correct 72 ms 2680 KB Output is correct
4 Correct 64 ms 5364 KB Output is correct
5 Correct 66 ms 5428 KB Output is correct
6 Correct 67 ms 5364 KB Output is correct
7 Correct 3 ms 640 KB Output is correct
8 Correct 5 ms 640 KB Output is correct
9 Correct 3 ms 640 KB Output is correct
10 Correct 24 ms 2804 KB Output is correct