Submission #885530

#	Time	Username	Problem	Language	Result	Execution time	Memory
885530		Requiem	Deda (COCI17_deda)	C++17	140 / 140	83 ms	11096 KiB

deda

#include<bits/stdc++.h>
#define int long long
#define pb push_back
#define fast ios_base::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
#define MOD 1000000007
#define INF 1e18
#define fi first
#define se second
#define endl "\n"
#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 sz(a) ((int)(a).size())
#define pi 3.14159265359
#define TASKNAME ""
template<typename T> bool maximize(T &res, const T &val) { if (res < val){ res = val; return true; }; return false; } 
template<typename T> bool minimize(T &res, const T &val) { if (res > val){ res = val; return true; }; return false; } 
using namespace std; 
typedef pair<int,int> ii; 
typedef pair<int,ii> iii; 
typedef vector<int> vi; 
int n,m;
const int MAXN = 2e5 + 9;
int st[MAXN<<2];
void update(int node,int l,int r,int pos,int val){
    if (l==r){
        st[node] = val;
        return;
    }
    int mid = (l+r)>>1;
    if (pos <= mid) update(node<<1,l,mid,pos,val);
    else update(node<<1|1,mid+1,r,pos,val);
    st[node] = min(st[node<<1], st[node<<1|1]);
}
int get(int node,int l,int r,int u,int v,int y){
    int mid = (l+r)>>1;

    if (l>=u and r<=v){
        if (st[node] > y) return -1;
        if (l==r) return l;
        else if (st[node<<1] <= y) {
            return get(node<<1,l,mid,u,v,y);
        }
        else if (st[node<<1|1] <= y){
            return get(node<<1|1,mid+1,r,u,v,y);
        }
        else return -1;
    }
    if (l>v or r<u) return -1;
    int g1 = get(node<<1,l,mid,u,v,y);
    if (g1 != -1) return g1;
    else return get(node<<1|1,mid+1,r,u,v,y);
}
main() 
{ 
    fast; 
   if (fopen(TASKNAME".inp","r")){
        freopen(TASKNAME".inp","r",stdin); 
        freopen(TASKNAME".out","w",stdout); 
   }
   cin>>n>>m;
   memset(st,0x3f,sizeof(st));
   for(int i=1;i<=m;i++){
       char c;
       int x,a;
       cin>>c>>x>>a;
       if (c == 'M'){
           update(1,1,n,a,x);
       }
       else{
           cout<<get(1,1,n,a,n,x)<<endl;
       }
   } 
} 

Compilation message (stderr)

deda.cpp:53:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   53 | main()
      | ^~~~
deda.cpp: In function 'int main()':
deda.cpp:57:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   57 |         freopen(TASKNAME".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
deda.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(TASKNAME".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 140 / 140