oj.uz

Submission #209223

# Submission time Handle Problem Language Result Execution time Memory
209223 2020-03-13T12:44:45 Z mieszko11b Street Lamps (APIO19_street_lamps) C++14
60 / 100
 249 ms 15096 KB 
#include <bits/stdc++.h>

using namespace std;

int n, q;
char c[107][107];
int before[300007], last0[300007];
char cc[300007];
int a[300007], b[300007];
int d[1200007];
int lv;

void insert(int w, int x) {
	w += lv;
	d[w] = x;
	w /= 2;
	while(w) {
		d[w] = max(d[2 * w], d[2 * w + 1]);
		w /= 2;
	}
}

int query(int a, int b) {
	if(a > b) return 1e9;
	int va = a +lv;
	int vb = b + lv;
	int res = max(d[va], d[vb]);
	while(va / 2 != vb/  2) {
		if(va % 2 == 0)
			res = max(res, d[va + 1]);
		if(vb % 2 == 1)
			res = max(res, d[vb - 1]);
		va /= 2;
		vb /= 2;
	}
	return res;
}


int main() {
	scanf("%d%d", &n, &q);
	if(n <= 100 && q <= 100) {
		scanf(" %s", c[0] + 1);
		for(int i = 1 ; i <= q ; i++) {
			char comm[10];
			
			for(int j = 1 ; j <= n ; j++)	
				c[i][j] = c[i - 1][j];
			
			scanf(" %s", comm);
			if(comm[0] == 'q') {
				int a, b;
				scanf("%d%d", &a, &b);
				int res = 0;
				for(int j = 0 ; j < i ; j++) {
					bool ok = true;
					for(int k = a ; k < b ; k++)
						if(c[j][k] == '0')
							ok = false;
					if(ok) res++;
				}
				printf("%d\n", res);
			} else {
				int w;
				scanf("%d", &w);
				
				if(c[i][w] == '0') c[i][w] = '1';
				else c[i][w] = '0';
			}
		}
		return 0;
	}
	
	scanf(" %s", cc + 1);
	
	bool kosno = true;
	
	for(int i = 1 ; i <= q ; i++) {
		char comm[10];
		scanf(" %s", comm);
		if(comm[0] == 'q') {
			int a, b;
			scanf("%d%d", &a, &b);
			::a[i] = a;
			::b[i] = b;
			if(b != a + 1)
				kosno = false;
		} else {
			int w;
			scanf("%d", &w);
			::a[i] = -1;
			::b[i] = w;
		}				
	}
	
	if(kosno) {
		memset(last0, -1, sizeof last0);
		
		for(int i = 1 ; i <= q ; i++) {
			if(a[i] != -1) {
				int a = ::a[i];
				int b = ::b[i];
				int res = before[a];
				if(cc[a] == '1')
					res += i - last0[a] - 1;
				printf("%d\n", res);
			} else {
				int w = b[i];
				if(cc[w] == '1') {
					before[w] += i - last0[w] - 1;
					cc[w] = '0';
				} else {
					last0[w] = i - 1;
					cc[w] = '1';
				}
			}
		}
		return 0;
	}
	
	lv = 2;
	while(lv < n + 2)
		lv *= 2;
		
	for(int i = 1 ; i < 2 * lv ; i++)
		d[i] = 1e9;
		
	for(int i = 1 ; i <= n ; i++)
		if(cc[i] == '1')
			insert(i, 0);
		
	for(int i = 1 ; i <= q ; i++) {
		if(a[i] != -1) {
			int a = ::a[i];
			int b = ::b[i];
			
			int q = query(a, b - 1);
			printf("%d\n", max(0, i - q));
		} else {
			int w = b[i];
			insert(w, i);
		}
	}
	
	return 0;
}

Compilation message

street_lamps.cpp: In function 'int main()':
street_lamps.cpp:102:9: warning: unused variable 'b' [-Wunused-variable]
     int b = ::b[i];
         ^
street_lamps.cpp:41:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &n, &q);
  ~~~~~^~~~~~~~~~~~~~~~
street_lamps.cpp:43:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf(" %s", c[0] + 1);
   ~~~~~^~~~~~~~~~~~~~~~~
street_lamps.cpp:50:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf(" %s", comm);
    ~~~~~^~~~~~~~~~~~~
street_lamps.cpp:53:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &a, &b);
     ~~~~~^~~~~~~~~~~~~~~~
street_lamps.cpp:65:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &w);
     ~~~~~^~~~~~~~~~
street_lamps.cpp:74:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf(" %s", cc + 1);
  ~~~~~^~~~~~~~~~~~~~~
street_lamps.cpp:80:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf(" %s", comm);
   ~~~~~^~~~~~~~~~~~~
street_lamps.cpp:83:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d%d", &a, &b);
    ~~~~~^~~~~~~~~~~~~~~~
street_lamps.cpp:90:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d", &w);
    ~~~~~^~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 4 ms 380 KB Output is correct
4 Correct 5 ms 376 KB Output is correct
5 Correct 5 ms 376 KB Output is correct
6 Correct 5 ms 376 KB Output is correct
7 Correct 5 ms 376 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 114 ms 4728 KB Output is correct
2 Correct 121 ms 4856 KB Output is correct
3 Correct 121 ms 4856 KB Output is correct
4 Correct 139 ms 6012 KB Output is correct
5 Correct 150 ms 5112 KB Output is correct
6 Correct 127 ms 6008 KB Output is correct
7 Correct 166 ms 4932 KB Output is correct
8 Correct 161 ms 6136 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 5 ms 376 KB Output is correct
4 Correct 6 ms 376 KB Output is correct
5 Correct 118 ms 11104 KB Output is correct
6 Correct 157 ms 12024 KB Output is correct
7 Correct 191 ms 12664 KB Output is correct
8 Correct 249 ms 15096 KB Output is correct
9 Correct 113 ms 5880 KB Output is correct
10 Correct 127 ms 6520 KB Output is correct
11 Correct 124 ms 6644 KB Output is correct
12 Correct 228 ms 13560 KB Output is correct
13 Correct 249 ms 14968 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Incorrect 5 ms 376 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 4 ms 380 KB Output is correct
4 Correct 5 ms 376 KB Output is correct
5 Correct 5 ms 376 KB Output is correct
6 Correct 5 ms 376 KB Output is correct
7 Correct 5 ms 376 KB Output is correct
8 Correct 114 ms 4728 KB Output is correct
9 Correct 121 ms 4856 KB Output is correct
10 Correct 121 ms 4856 KB Output is correct
11 Correct 139 ms 6012 KB Output is correct
12 Correct 150 ms 5112 KB Output is correct
13 Correct 127 ms 6008 KB Output is correct
14 Correct 166 ms 4932 KB Output is correct
15 Correct 161 ms 6136 KB Output is correct
16 Correct 5 ms 376 KB Output is correct
17 Correct 5 ms 376 KB Output is correct
18 Correct 5 ms 376 KB Output is correct
19 Correct 6 ms 376 KB Output is correct
20 Correct 118 ms 11104 KB Output is correct
21 Correct 157 ms 12024 KB Output is correct
22 Correct 191 ms 12664 KB Output is correct
23 Correct 249 ms 15096 KB Output is correct
24 Correct 113 ms 5880 KB Output is correct
25 Correct 127 ms 6520 KB Output is correct
26 Correct 124 ms 6644 KB Output is correct
27 Correct 228 ms 13560 KB Output is correct
28 Correct 249 ms 14968 KB Output is correct
29 Correct 5 ms 376 KB Output is correct
30 Incorrect 5 ms 376 KB Output isn't correct
31 Halted 0 ms 0 KB -