Submission #936141

#	Time	Username	Problem	Language	Result	Execution time	Memory
936141		vjudge1	Global Warming (CEOI18_glo)	C++17	10 / 100	31 ms	2648 KiB

glo

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

typedef long long ll ;
typedef vector<int> vi;
typedef pair<int,int> pii;
#define pb push_back
#define FOR(i,a,b) for(int i = (a); i <= (b) ; i++)
#define FORD(i,a,b) for(int i = (a) ; i>= (b) ; i--)
#define TASK "test"
#define TASK1 "gues"
#define eb emplace_back
#define ed "\n"
#define ALL(v) v.begin(),v.end()
#define fi first
#define se second
#define BIT(i,x) (((x) >> (i))&1)
const int maxn = 4e5 + 5 , mod = 1e9+7;
const int d4x[4] = {-1, 0, 1, 0};
const int d4y[4] = {0, 1, 0, -1};
const int d8x[8] = {-1, -1, 0, 1, 1, 1, 0, -1};
const int d8y[8] = {0, 1, 1, 1, 0, -1, -1, -1};

int n,x,a[maxn],dp[maxn];

void read(){
    cin>>n>>x;
    FOR(i,1,n) cin>>a[i];
}

void solve(){
    dp[1]=1;
    int res=1,l,r,m,ans;
    for(int i=2;i<=n;i++){
        l=1, r=res, ans=0;
        while(l<=r){
            m = (l+r)>>1;
            if(a[i]>a[dp[m]]){
                l = m+1;
                ans=m;
            }
            else r= m-1;
        }
        if(ans==res) dp[++res] = i;
        if(a[i]<a[dp[ans+1]]) dp[ans+1] = i;
    }
    cout<<res;
}

signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    if(fopen(TASK".inp","r")){
        freopen(TASK".inp","r",stdin);
        freopen(TASK".out","w",stdout);
    }
    if(fopen(TASK1".inp","r")){
        freopen(TASK1".inp","r",stdin);
        freopen(TASK1".out","w",stdout);
    }
    int t = 1;
    while(t--){
        read();
        solve();
    }
}

Compilation message (stderr)

glo.cpp: In function 'int main()':
glo.cpp:54:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   54 |         freopen(TASK".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
glo.cpp:55:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   55 |         freopen(TASK".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
glo.cpp:58:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   58 |         freopen(TASK1".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
glo.cpp:59:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 |         freopen(TASK1".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 13
• Subtask 4: 10 / 10
• Subtask 5: 0 / 20
• Subtask 6: 0 / 17
• Subtask 7: 0 / 25