Submission #1271501

#	Time	Username	Problem	Language	Result	Execution time	Memory
1271501		sasde	JJOOII 2 (JOI20_ho_t2)	C++20	0 / 100	0 ms	324 KiB

ho_t2

#include<bits/stdc++.h>
using namespace std;
bool M1;
#define PI 3.14159265358979323846
#define sz(a) (int)a.size()
#define all(x) x.begin(),x.end()
#define ii pair<int,int>
#define iii pair<int,ii>
#define iv pair<ii,ii>
#define se second
#define fi first
#define ffi fi.fi
#define sfi se.fi
#define sse se.se
#define fse fi.se
#define lt(i, c, d) for(int i = c; i <= d; ++i)
#define fl(i, c, d) for(int i = d; i >= c; --i)
#define pb push_back
#define emb emplace_back
#define emf emplace_front
#define em emplace
#define look_memory cerr<<abs(&M2-&M1)/1024.0/1024<<'\n'
#define look_time   cerr << "TIME : " << clock() * 0.001 << "s" <<'\n'
const int N=1e6+5,lg=30,mod=1e9+7;
mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());
int Rand(int u,int v){
 return u+rd()%(v-u+1);
}
int dx[]={1,0,-1,0,1,1,-1,-1};
int dy[]={0,-1,0,1,1,-1,1,-1};
int node,k;
string s;
bool M2;
void solve(){
	cin >> node >> k >> s;
	s=" "+s;
	stack<int>st;
	int ans=0,i=1;	
	for(i=1;i<=node;++i){
		if(s[i]=='J'){
			st.em(i);
		}
		else if(sz(st))++ans;
		if(sz(st)==k)break;
	}
	if(sz(st)<k){
		cout <<-1;
		return;
	}
	++i;
	for(;i<=node;++i){
		if(s[i]=='O'){
			st.em(i);
		}
		else if(sz(st))++ans;
		if(sz(st)==2*k)break;
	}
	if(sz(st)<2*k){
		cout <<-1;
		return;
	}
	while(!st.empty())st.pop();
	// cout <<i<<'\n';
	++i;
	int j=i;
	for(;j<=node;++j){
		if(s[j]=='I'){
			st.em(j);
		}
		if(sz(st)==k)break;
	}
	// cout <<i<<" "<<j<<" "<<ans<<'\n';
	for(;j>=i;--j){
		if(s[j]=='I'){
			st.em(j);
		}
		else if(sz(st))++ans;
	}
	cout<<ans;

}
main()
{
  srand(time(0));
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    #define task "aws"
    if(fopen(task".inp","r")){
      freopen(task".inp","r",stdin);
      freopen(task".out","w",stdout);
    }
    int t=1;
 //   cin >> t;
while(t--){
    solve();cout<<'\n';
}
look_memory;
look_time;
}

Compilation message (stderr)

ho_t2.cpp:82:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   82 | main()
      | ^~~~
ho_t2.cpp: In function 'int main()':
ho_t2.cpp:90:14: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   90 |       freopen(task".inp","r",stdin);
      |       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
ho_t2.cpp:91:14: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   91 |       freopen(task".out","w",stdout);
      |       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 1
• Subtask 2: 0 / 12
• Subtask 3: 0 / 87