Submission #862728

#TimeUsernameProblemLanguageResultExecution timeMemory
862728Ahmed_SolymanOsumnjičeni (COCI21_osumnjiceni)C++14
0 / 110
58 ms592 KiB
/* In the name of Allah made by: Ahmed_Solyman */ #include <bits/stdc++.h> #include <ext/rope> using namespace std; using namespace __gnu_cxx; #pragma GCC optimize("-Ofast") #pragma GCC optimize("-O1") //-------------------------------------------------------------// typedef long long ll; typedef unsigned long long ull; #define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0); #define PI acos(-1) #define lb lower_bound #define ub upper_bound #define endl '\n' #define all(v) v.begin(),v.end() #define allr(v) v.rbegin(),v.rend() #define sum_to(n) (n*(n+1))/2 #define pb push_back #define pf push_front #define fil(arr,x) memset(arr,x,sizeof(arr)) const ll mod=1e9+7; int dx[8]={0,1,0,-1,1,1,-1,-1}; int dy[8]={1,0,-1,0,1,-1,-1,1}; //-------------------------------------------------------------// ll lcm(ll a,ll b) { return (max(a,b)/__gcd(a,b))*min(a,b); } void person_bool(bool x) { cout<<(x?"YES":"NO")<<endl; } const int N=2e5+5; int l[N],r[N],dp[N][21],Log[N]; int main() { //freopen("input.txt","r",stdin); //freopen("output.txt","w",stdout); #ifndef ONLINE_JUDGE freopen("input.in", "r", stdin); freopen("output.out", "w", stdout); #endif fast int n;cin>>n; for(int i=1;i<=n;i++){ cin>>l[i]>>r[i]; } for(int i=n;i>=1;i--){ dp[i][0]=n+1; for(int j=i+1;j<=n;j++){ if(!(l[j]>r[i] || r[j]<l[i])){ dp[i][0]=j; break; } } if(i<n)dp[i][0]=min(dp[i][0],dp[i+1][0]); } int q;cin>>q; while(q--){ int a,b;cin>>a>>b; int ans=0; while(a<=b)a=dp[a][0],ans++; cout<<ans<<endl; } return 0; }

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:45:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |    freopen("input.in", "r", stdin);
      |    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:46:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   46 |     freopen("output.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
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