Submission #693148

#	Time	Username	Problem	Language	Result	Execution time	Memory
693148		ktkerem	Weighting stones (IZhO11_stones)	C++17	100 / 100	224 ms	13852 KiB

stones

/*#pragma GCC target ("avx2")
#pragma GCC optimize ("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize ("unroll-loops")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")/**/
#include<bits/stdc++.h>
//typedef int ll;
typedef long long ll;
typedef unsigned long long ull;
#define llll std::pair<ll , ll>
#define pb push_back
#define pf push_front
#define halo cout << "hello" << std::endl
#define fi first
#define sec second
#define all(a) a.begin() , a.end()
const ll limit = 1e18+7; 
const ll ous = 2e5 + 500;
const ll dx[4] = {-1 , 0 , 1 , 0} , dy[4] = {0,1,0,-1};
std::mt19937 rng(std::chrono::steady_clock::now().time_since_epoch().count());
ll nk;
struct segt{
    std::vector<llll> valt;
    ll N = 0;
    ll prebuild(ll n){
        N = n;
        valt.resize(4 * N + 5);
        return 1;
    }
    void upd(ll nt , llll upd , ll  a = 1 , ll nl = 0 , ll nr = 0){
        if(a== 1){
            nr = N-1;
        }
        if(nt > nr || nt < nl){
            return;
        }
        if(nl == nr){
            valt[a] = upd;
            //std::cout << a << " " << nl << " " << nr  << " " << valt[a].fi << " " << valt[a].sec << "\n";
            return ;
        }
        ll md= (nl + nr)/2;
        //std::cout << nt << "\n";
        segt::upd(nt , upd , a*2 , nl , md);
        segt::upd(nt , upd ,a*2+1,md+1, nr);
        ll nb = std::max(0ll , valt[a*2].fi - valt[a*2+1].sec);
        ll ng = valt[a*2+1].sec - (valt[a*2].fi - nb);;
        valt[a] = {nb + valt[a*2+1].fi , ng + valt[a*2].sec};
        //std::cout << a << " " << nl << " " << nr  << " " << valt[a].fi << " " << valt[a].sec << "\n";
        return;
    }
};
void solve(){
    std::cin >> nk;
    segt a , b;
    a.prebuild(nk);
    b.prebuild(nk);
    for(ll i=0;nk>i;i++){
        ll x , y;std::cin >> x >> y;
        if(y == 1){
            a.upd(x-1 , {0 , 1});
            //std::cout << "\n";
            b.upd(x-1 , {1 , 0});
        }
        else{
            b.upd(x-1 , {0 , 1});
            //std::cout << "\n";
            a.upd(x-1 , {1 , 0});
        }
        /*std::cout << a.valt[1].fi << " " << a.valt[1].sec << "\n";
        std::cout << b.valt[1].fi << " " << b.valt[1].sec << "\n";*/
        if(a.valt[1].fi == 0){
            std::cout << ">\n";
        }
        else if(b.valt[1].fi == 0){
            std::cout << "<\n";
        }
        else{
            std::cout << "?\n";
        }
    }
    return;/**/
}
signed main(){
    //std::ios_base::sync_with_stdio(false);std::cin.tie(NULL);
    ll t=1;
    //std::cin >> t;
    ll o = 1;
    while(t--){ 
        //std::cout << "Case " << o << ": ";
        //o++;
        solve();        
    }
    return 0;
}/**/

Compilation message (stderr)

stones.cpp:5:78: warning: "/*" within comment [-Wcomment]
    5 | #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")/**/
      |                                                                               
stones.cpp: In function 'int main()':
stones.cpp:88:8: warning: unused variable 'o' [-Wunused-variable]
   88 |     ll o = 1;
      |        ^

• Subtask 1: 100 / 100