Submission #63005

#	Time	Username	Problem	Language	Result	Execution time	Memory
63005		hamzqq9	parentrises (BOI18_parentrises)	C++14	50 / 100	62 ms	1332 KiB

parentrises

#include<bits/stdc++.h>
#define st first
#define nd second
#define pb push_back
#define ppb pop_back
#define umax(x,y) x=max(x,y)
#define umin(x,y) x=min(x,y)
#define ll long long
#define ii pair<int,int>
#define iii pair<ii,int>
#define sz(x) (x.size())
#define orta ((bas+son)>>1)
#define all(x) x.begin(),x.end()
#define dbgs(x) cerr<<(#x)<<" --> "<<(x)<<" "
#define dbg(x) cerr<<(#x)<<" --> "<<(x)<<endl;getchar()
#define pw(x) (1<<(x))
#define inf 1000500000
#define MOD 1000000007
#define N 305
#define LOG 20
using namespace std;

int p,t,x,n;
int cnt[2][N][N],res[N];
char s[1000006],col[1000006];

bool check() {

	int lastbal=0,allbal=0;

	for(int i=1;i<=n;i++) {

		if(s[i]=='(') {

			allbal++;
			lastbal++;

		}
		else {

			lastbal=max(0,lastbal-2);

		}

		if(2*allbal<(i-allbal)) return false;

	}

	return (lastbal==0);

}

void fill_r(int bas,int son) {

	int op=0;

	int tot=son-bas+1;

	for(int i=bas;i<=son;i++) op+=(s[i]=='(');

	if(op>tot-op) {

		int putG=op-(tot-op);
		int putB=putG;

		for(int i=son;i>=bas;i--) {

			if(s[i]==')' && putG) {

				--putG;

				col[i]='G';

			}
			else if(s[i]==')') {

				col[i]='R';

			}

			if(s[i]=='(' && putB) {

				--putB;

				col[i]='B';

			}
			else if(s[i]=='(') {

				col[i]='R';

			}

		}

	}
	else {

		int putG=(tot-op)-op;
		int putB=putG;

		for(int i=bas;i<=son;i++) {

			if(s[i]=='(' && putG) {

				--putG;

				col[i]='G';

			}
			else if(s[i]=='(') {

				col[i]='R';

			}

			if(s[i]==')' && putB) {

				--putB;

				col[i]='B';

			}
			else if(s[i]==')') {

				col[i]='R';

			}

		}

	}

}

void create(int now) {

	int cur_op=0;

	for(int i=now;i<=n;i++) {

		if(s[i]=='(' && cur_op<0) {

			fill_r(now,i-1);

			create(i);

			return ;

		}

		if(s[i]=='(') cur_op++;
		else cur_op--;

	}

	fill_r(now,n);

}

void print() {

	for(int i=1;i<=n;i++) printf("%c",col[i]);

	puts("");

}

void find_ans() {

	if(!check()) {

		printf("impossible\n");

		return ;

	}

	create(1);

	print();

}

void solve1() {

	while(t--) {

		scanf("%s",s+1);

		n=strlen(s+1);

		find_ans();

	}

}

void dp() {

	cnt[1][0][0]=1;

	for(int i=0;i<N;i++) {

		for(int j=0;j<=i;j++) {

			for(int k=0;k<=j;k++) {

				if(j*2<i-j) cnt[1][j][k]=0;

				cnt[0][j][k]=cnt[1][j][k];
				
				if(k==0) res[i]=(res[i]+cnt[0][j][k])%MOD;

			}

		}

		memset(cnt[1],0,sizeof(cnt[1]));

		for(int j=0;j<=i;j++) {

			for(int k=0;k<=j;k++) {

				cnt[1][j+1][k+1]=(cnt[1][j+1][k+1]+cnt[0][j][k])%MOD;
				cnt[1][j][max(0,k-2)]=(cnt[1][j][max(0,k-2)]+cnt[0][j][k])%MOD;

			}
		
		}

	}

}

void solve2() {

	dp();

	while(t--) {

		scanf("%d",&x);

		printf("%d\n",res[x]);

	}

}

int main() {

//	freopen("input.txt","r",stdin);

	scanf("%d %d",&p,&t);

	if(p==1) solve1();
	else solve2();

}

Compilation message (stderr)

parentrises.cpp: In function 'void solve1()':
parentrises.cpp:189:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%s",s+1);
   ~~~~~^~~~~~~~~~
parentrises.cpp: In function 'void solve2()':
parentrises.cpp:242:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&x);
   ~~~~~^~~~~~~~~
parentrises.cpp: In function 'int main()':
parentrises.cpp:254:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&p,&t);
  ~~~~~^~~~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 11
• Subtask 3: 0 / 6
• Subtask 4: 0 / 28
• Subtask 5: 6 / 6
• Subtask 6: 16 / 16
• Subtask 7: 28 / 28