Submission #337780

#	Time	Username	Problem	Language	Result	Execution time	Memory
337780		beksultan04	Weighting stones (IZhO11_stones)	C++14	100 / 100	76 ms	7020 KiB

stones

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define pii pair<int,int>
#define OK puts("OK");
#define NO puts("NO");
#define YES puts("YES");
#define fr first
#define sc second
#define ret return
#define scan1(a) scanf("%lld",&a);
#define scan2(a,b) scanf("%lld %lld",&a, &b);
#define scan3(a,b,c) scanf("%lld %lld %lld",&a,&b,&c);
#define all(s) s.begin(),s.end()
#define allr(s) s.rbegin(),s.rend()
#define pb push_back
#define sz(v) (int)v.size()
#define endi puts("");
const int N = 1e6+12,INF=1e9+7;
int pus[N];
pii der[N];
void push(int v,int l,int r){
    der[v].fr += pus[v];
    der[v].sc += pus[v];
    if (l != r){
        pus[v<<1]+=pus[v];
        pus[(v<<1)+1]+=pus[v];
    }
    pus[v]=0;
}


void update(int v,int l,int r,int ql,int qr,int x){
    push(v,l,r);
    if (ql > r || l > qr)ret ;
    if (ql <= l && r <= qr){
        pus[v]+=x;
        push(v,l,r);
        ret ;
    }
    int m = (l+r)>>1;
    update(v<<1,l,m,ql,qr,x);
    update((v<<1)+1,m+1,r,ql,qr,x);
    der[v].fr = min(der[v<<1].fr,der[(v<<1)+1].fr);
    der[v].sc = max(der[v<<1].sc,der[(v<<1)+1].sc);
}

main(){
    int n,i;
    scan1(n)
    i=n;
    while (i--){
        int a,b;
        scan2(a,b)
        if (b == 1){
            update(1,1,n,1,a,-1);
        }
        else {
            update(1,1,n,1,a,1);
        }
        if (der[1].fr >= 0){
            cout <<"<\n";
        }
        else if (der[1].sc <= 0){
            cout <<">\n";
        }
        else cout <<"?\n";
    }

}

Compilation message (stderr)

stones.cpp:48:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   48 | main(){
      |      ^
stones.cpp: In function 'int main()':
stones.cpp:11:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   11 | #define scan1(a) scanf("%lld",&a);
      |                  ~~~~~^~~~~~~~~~~
stones.cpp:50:5: note: in expansion of macro 'scan1'
   50 |     scan1(n)
      |     ^~~~~
stones.cpp:12:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   12 | #define scan2(a,b) scanf("%lld %lld",&a, &b);
      |                    ~~~~~^~~~~~~~~~~~~~~~~~~~
stones.cpp:54:9: note: in expansion of macro 'scan2'
   54 |         scan2(a,b)
      |         ^~~~~

• Subtask 1: 100 / 100