Submission #239815

#	Time	Username	Problem	Language	Result	Execution time	Memory
239815		mhy908	Pilot (NOI19_pilot)	C++14	89 / 100	1057 ms	72016 KiB

pilot

#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
#define eb emplace_back
#define mp make_pair
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define svec(x) sort(x.begin(), x.end())
#define press(x) x.erase(unique(x.begin(), x.end()), x.end())
#define lb(x, v) lower_bound(x.begin(), x.end(), v)
#define ub(x, v) upper_bound(x.begin(), x.end(), v)
using namespace std;
typedef long long LL;
typedef pair<int, int> pii;
typedef pair<LL, LL> pll;
typedef pair<int, LL> pil;
typedef pair<LL, int> pli;
const LL llinf=2000000000000000000;
const LL mod1=1000000007;
const LL mod2=998244353;
const int inf=2000000000;
int n, q;
vector<int> vc[1000010];
LL ans[1000010], nans, tmp;
bool ch[1000010];
struct UNION_FIND{
    int par[1000010];
    LL sz[1000010];
    UNION_FIND(){for(int i=1; i<=1000000; i++)par[i]=i, sz[i]=1;}
    int findpar(int num){return num==par[num]?num:par[num]=findpar(par[num]);}
    void mergepar(int a, int b){
        a=findpar(a);
        b=findpar(b);
        if(a==b)return;
        nans-=sz[a]*(sz[a]+1)/2;
        nans-=sz[b]*(sz[b]+1)/2;
        sz[a]+=sz[b];
        par[b]=a;
        nans+=sz[a]*(sz[a]+1)/2;
    }
}uf;
int main(){
    scanf("%d %d", &n, &q);
    nans=(LL)n;
    tmp=(LL)n;
    for(int i=1; i<=n; i++){
        int a;
        scanf("%d", &a);
        vc[a].eb(i);
    }
    for(int i=1; i<=1000000; i++){
        for(auto j:vc[i]){
            ch[j]=true;
            if(ch[j+1])uf.mergepar(j, j+1);
            if(ch[j-1])uf.mergepar(j-1, j);
            tmp--;
        }
        ans[i]=nans-tmp;
    }
    for(int i=1; i<=q; i++){
        int a;
        scanf("%d", &a);
        printf("%lld\n", ans[a]);
    }
}

Compilation message (stderr)

pilot.cpp: In function 'int main()':
pilot.cpp:45:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &q);
     ~~~~~^~~~~~~~~~~~~~~~~
pilot.cpp:50:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &a);
         ~~~~~^~~~~~~~~~
pilot.cpp:64:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &a);
         ~~~~~^~~~~~~~~~

• Subtask 1: 3 / 3
• Subtask 2: 10 / 10
• Subtask 3: 12 / 12
• Subtask 4: 15 / 15
• Subtask 5: 5 / 5
• Subtask 6: 9 / 9
• Subtask 7: 14 / 14
• Subtask 8: 10 / 10
• Subtask 9: 11 / 11
• Subtask 10: 0 / 11