Submission #53989603

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Source Code Expand

// LUOGU_RID: 160595055
#include<bits/stdc++.h>
#define Gc() getchar()
#define Me(x,y) memset(x,y,sizeof(x))
#define Mc(x,y) memcpy(x,y,sizeof(x))
#define d(x,y) ((m)*(x-1)+(y))
#define R(n) (rnd()%(n)+1)
#define Pc(x) putchar(x)
#define LB lower_bound
#define UB upper_bound
#define fi first
#define se second
#define eb emplace_back
#define all(x) x.begin(),x.end()
using namespace std;using ll=long long;using db=double;using lb=long db;using ui=unsigned;using ull=unsigned long long;using pii=pair<int,int>;
const int N=1e6+5,M=(1<<20)+5,K=1000+5,mod=998244353,Mod=mod-1;const db eps=1e-9;const int INF=1e9+7;mt19937 rnd(181766);
#define Tp template<typename T>
#define Ts template<typename T,typename... Ar>
namespace Debug{
	Tp void _debug(char* f,T t){cerr<<f<<'='<<t<<endl;}
	Ts void _debug(char* f,T x,Ar... y){while(*f!=',') cerr<<*f++;cerr<<'='<<x<<",";_debug(f+1,y...);}
	#ifdef LOCAL
	#define gdb(...) _debug((char*)#__VA_ARGS__,__VA_ARGS__)
	#else 
	#define gdb(...) void()
	#endif
}using namespace Debug;
int n,A[N],mi[N];char s[N];
int calc(int lim){
	int mx=0,cnt=0;
	for(int i=1;i<=n;i++){
		if(s[i]=='?'&&mi[i]-2*(cnt+1)>=lim) cnt++;
		mx=max(mx,A[i]-2*cnt);
	}
	// gdb(lim,mx);
	return mx-lim;
}
void Solve(){
	int i,j;scanf("%s",s+1);n=strlen(s+1);
	for(i=1;i<=n;i++) A[i]=A[i-1]+(s[i]=='0'?-1:1);
	mi[n+1]=INF;for(i=n;~i;i--) mi[i]=min(mi[i+1],A[i]);
	printf("%d\n",min(calc(mi[0]),calc(mi[0]-1)));
}
int main(){
	int t=1;
	// scanf("%d",&t);
	while(t--) Solve();
	cerr<<clock()*1.0/CLOCKS_PER_SEC<<'\n';
}

Submission Info

Compile Error

Main.cpp: In function ‘void Solve()’:
Main.cpp:39:15: warning: unused variable ‘j’ [-Wunused-variable]
   39 |         int i,j;scanf("%s",s+1);n=strlen(s+1);
      |               ^
Main.cpp:39:22: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   39 |         int i,j;scanf("%s",s+1);n=strlen(s+1);
      |                 ~~~~~^~~~~~~~~~

Judge Result