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Submission #391517

# Submission time Handle Problem Language Result Execution time Memory
391517 2021-04-19T06:42:12 Z patrikpavic2 Event Hopping 2 (JOI21_event2) C++17
100 / 100
 377 ms 30392 KB 
#include <cstdio>
#include <cstring>
#include <set>
#include <vector>
#include <algorithm>

#define PB push_back
#define X first
#define Y second

using namespace std;

const int N = 2e5 + 500;
const int LOG = 18; 
const int OFF = (1 << 18);

vector < int > saz;

int n, L[N], R[N], k;
int par[N][LOG];
vector < int > sol;
int T[2 * OFF], prop[2 * OFF];
set < int > S;

void refresh(int x){
	if(!prop[x]) return;
	T[x] += prop[x];
	if(x < OFF){
		prop[2 * x] += prop[x];
		prop[2 * x + 1] += prop[x];
	}
	prop[x] = 0;
}

void update(int i, int a, int b, int lo, int hi, int x){
	refresh(i);
	if(lo <= a && b <= hi){
		prop[i] += x; refresh(i);
		return;
	}
	if(a > hi || b < lo) return;
	update(2 * i, a, (a + b) / 2, lo, hi, x);
	update(2 * i + 1, (a + b) / 2 + 1, b, lo, hi, x);
	T[i] = max(T[2 * i], T[2 * i + 1]);
}

int query(int i, int a, int b, int lo, int hi){
	refresh(i);
	if(lo <= a && b <= hi) return T[i];
	if(a > hi || b < lo) return 0;
	return max(query(2 * i, a, (a + b) / 2, lo, hi), query(2 * i + 1, (a + b) / 2 + 1, b, lo, hi));
}

int query(int l, int r){
	int ans = 0;
	for(int k = LOG - 1;k >= 0;k--)
		if(par[l][k] <= r)
			l = par[l][k], ans += (1 << k);
	return ans;
}

int main(){
	scanf("%d%d", &n, &k);
	for(int i = 0;i < n;i++){
		scanf("%d%d", L + i, R + i);
		saz.PB(L[i]); saz.PB(R[i]);
	}
	for(int i = 0;i < N;i++) par[i][0] = N - 1;
	sort(saz.begin(), saz.end());
	saz.erase(unique(saz.begin(), saz.end()), saz.end());
	for(int i = 0;i < n;i++){
		L[i] = lower_bound(saz.begin(), saz.end(), L[i]) - saz.begin();
		R[i] = lower_bound(saz.begin(), saz.end(), R[i]) - saz.begin();
		par[L[i]][0] = min(par[L[i]][0], R[i]);
	}
	for(int i = N - 2;i >= 0;i--)
		par[i][0] = min(par[i][0], par[i + 1][0]);
	for(int j = 1;j < LOG;j++)
		for(int i = 0;i < N;i++)
			par[i][j] = par[par[i][j - 1]][j - 1];
	int sve = query(0, N - 2);
	//printf("sve = %d\n", sve);
	S.insert(0), S.insert(N - 2);
	for(int i = 0;i < n;i++){
		if((int)sol.size() == k) break;
		if(query(1, 0, OFF - 1, L[i], R[i] - 1)) continue;
		int LL = *(--S.upper_bound(L[i]));
		int RR = *S.lower_bound(R[i]);
	//	printf("i = %d\n", i);
		//printf("sve = %d (LL, RR) = %d (LL, L) = %d (R, RR) = %d\n", sve, query(LL, RR), query(LL, L[i]), query(R[i], RR));
		if(sve - query(LL, RR) + query(LL, L[i]) + query(R[i], RR) + 1 >= k){
			sol.PB(i); S.insert(L[i]); S.insert(R[i]);
			sve += query(LL, L[i]) + query(R[i], RR) - query(LL, RR) + 1;
			update(1, 0, OFF - 1, L[i], R[i] - 1, 1);
		}
	}
	//printf("%d\n", (int)sol.size());
	if((int)sol.size() < k)
		printf("-1\n");
	else{
		for(int x : sol)
			printf("%d\n", x + 1);
	}
	return 0;
}

Compilation message

event2.cpp: In function 'int main()':
event2.cpp:63:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   63 |  scanf("%d%d", &n, &k);
      |  ~~~~~^~~~~~~~~~~~~~~~
event2.cpp:65:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   65 |   scanf("%d%d", L + i, R + i);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 35 ms 14412 KB Output is correct
2 Correct 34 ms 14416 KB Output is correct
3 Correct 36 ms 14416 KB Output is correct
4 Correct 261 ms 30264 KB Output is correct
5 Correct 256 ms 29752 KB Output is correct
6 Correct 244 ms 29048 KB Output is correct
7 Correct 225 ms 27852 KB Output is correct
8 Correct 268 ms 30392 KB Output is correct
9 Correct 253 ms 29752 KB Output is correct
10 Correct 243 ms 29112 KB Output is correct
11 Correct 226 ms 27796 KB Output is correct
12 Correct 215 ms 26760 KB Output is correct
13 Correct 214 ms 26548 KB Output is correct
14 Correct 202 ms 26004 KB Output is correct
15 Correct 189 ms 25008 KB Output is correct
16 Correct 147 ms 22360 KB Output is correct
17 Correct 144 ms 22072 KB Output is correct
18 Correct 138 ms 21612 KB Output is correct
19 Correct 135 ms 21408 KB Output is correct
20 Correct 131 ms 21216 KB Output is correct
21 Correct 129 ms 21108 KB Output is correct
22 Correct 141 ms 21276 KB Output is correct
23 Correct 145 ms 21172 KB Output is correct
24 Correct 136 ms 21136 KB Output is correct
25 Correct 146 ms 21116 KB Output is correct
26 Correct 149 ms 21152 KB Output is correct
27 Correct 146 ms 21052 KB Output is correct
28 Correct 141 ms 18012 KB Output is correct
29 Correct 146 ms 18052 KB Output is correct
30 Correct 138 ms 17936 KB Output is correct
31 Correct 143 ms 18000 KB Output is correct
32 Correct 148 ms 18048 KB Output is correct
33 Correct 161 ms 18056 KB Output is correct
34 Correct 172 ms 23352 KB Output is correct
35 Correct 139 ms 21424 KB Output is correct
36 Correct 115 ms 19636 KB Output is correct
37 Correct 194 ms 25776 KB Output is correct
38 Correct 192 ms 25620 KB Output is correct
39 Correct 185 ms 25140 KB Output is correct
40 Correct 184 ms 24836 KB Output is correct
41 Correct 179 ms 24576 KB Output is correct
42 Correct 149 ms 17976 KB Output is correct
43 Correct 208 ms 25832 KB Output is correct
44 Correct 206 ms 25780 KB Output is correct
45 Correct 195 ms 25508 KB Output is correct
46 Correct 201 ms 25312 KB Output is correct

Subtask #2
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 34 ms 14412 KB Output is correct
2 Correct 33 ms 14336 KB Output is correct
3 Correct 36 ms 14380 KB Output is correct
4 Correct 33 ms 14424 KB Output is correct
5 Correct 34 ms 14420 KB Output is correct
6 Correct 34 ms 14416 KB Output is correct
7 Correct 34 ms 14412 KB Output is correct
8 Correct 34 ms 14408 KB Output is correct
9 Correct 33 ms 14412 KB Output is correct
10 Correct 34 ms 14404 KB Output is correct
11 Correct 36 ms 14412 KB Output is correct
12 Correct 34 ms 14416 KB Output is correct
13 Correct 34 ms 14424 KB Output is correct
14 Correct 33 ms 14420 KB Output is correct
15 Correct 34 ms 14376 KB Output is correct
16 Correct 34 ms 14412 KB Output is correct
17 Correct 34 ms 14436 KB Output is correct
18 Correct 34 ms 14412 KB Output is correct
19 Correct 34 ms 14428 KB Output is correct
20 Correct 35 ms 14420 KB Output is correct
21 Correct 36 ms 14424 KB Output is correct
22 Correct 33 ms 14432 KB Output is correct
23 Correct 34 ms 14404 KB Output is correct
24 Correct 32 ms 14412 KB Output is correct
25 Correct 35 ms 14412 KB Output is correct
26 Correct 35 ms 14412 KB Output is correct
27 Correct 33 ms 14412 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 34 ms 14412 KB Output is correct
2 Correct 33 ms 14336 KB Output is correct
3 Correct 36 ms 14380 KB Output is correct
4 Correct 33 ms 14424 KB Output is correct
5 Correct 34 ms 14420 KB Output is correct
6 Correct 34 ms 14416 KB Output is correct
7 Correct 34 ms 14412 KB Output is correct
8 Correct 34 ms 14408 KB Output is correct
9 Correct 33 ms 14412 KB Output is correct
10 Correct 34 ms 14404 KB Output is correct
11 Correct 36 ms 14412 KB Output is correct
12 Correct 34 ms 14416 KB Output is correct
13 Correct 34 ms 14424 KB Output is correct
14 Correct 33 ms 14420 KB Output is correct
15 Correct 34 ms 14376 KB Output is correct
16 Correct 34 ms 14412 KB Output is correct
17 Correct 34 ms 14436 KB Output is correct
18 Correct 34 ms 14412 KB Output is correct
19 Correct 34 ms 14428 KB Output is correct
20 Correct 35 ms 14420 KB Output is correct
21 Correct 36 ms 14424 KB Output is correct
22 Correct 33 ms 14432 KB Output is correct
23 Correct 34 ms 14404 KB Output is correct
24 Correct 32 ms 14412 KB Output is correct
25 Correct 35 ms 14412 KB Output is correct
26 Correct 35 ms 14412 KB Output is correct
27 Correct 33 ms 14412 KB Output is correct
28 Correct 37 ms 14688 KB Output is correct
29 Correct 37 ms 14688 KB Output is correct
30 Correct 37 ms 14684 KB Output is correct
31 Correct 36 ms 14588 KB Output is correct
32 Correct 37 ms 14664 KB Output is correct
33 Correct 37 ms 14516 KB Output is correct
34 Correct 36 ms 14540 KB Output is correct
35 Correct 40 ms 14944 KB Output is correct
36 Correct 40 ms 14916 KB Output is correct
37 Correct 39 ms 14916 KB Output is correct
38 Correct 38 ms 14520 KB Output is correct
39 Correct 44 ms 14816 KB Output is correct
40 Correct 39 ms 14812 KB Output is correct
41 Correct 38 ms 14788 KB Output is correct
42 Correct 38 ms 14548 KB Output is correct
43 Correct 37 ms 14756 KB Output is correct
44 Correct 37 ms 14688 KB Output is correct
45 Correct 38 ms 14676 KB Output is correct
46 Correct 36 ms 14580 KB Output is correct
47 Correct 36 ms 14688 KB Output is correct
48 Correct 36 ms 14688 KB Output is correct
49 Correct 36 ms 14676 KB Output is correct
50 Correct 37 ms 14516 KB Output is correct
51 Correct 37 ms 14660 KB Output is correct
52 Correct 35 ms 14660 KB Output is correct
53 Correct 35 ms 14684 KB Output is correct
54 Correct 36 ms 14548 KB Output is correct
55 Correct 39 ms 14660 KB Output is correct
56 Correct 39 ms 14660 KB Output is correct
57 Correct 37 ms 14664 KB Output is correct
58 Correct 38 ms 14684 KB Output is correct
59 Correct 39 ms 14676 KB Output is correct
60 Correct 40 ms 14684 KB Output is correct
61 Correct 38 ms 14692 KB Output is correct
62 Correct 37 ms 14688 KB Output is correct
63 Correct 38 ms 14660 KB Output is correct
64 Correct 37 ms 14668 KB Output is correct

Subtask #4
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 35 ms 14412 KB Output is correct
2 Correct 34 ms 14416 KB Output is correct
3 Correct 36 ms 14416 KB Output is correct
4 Correct 261 ms 30264 KB Output is correct
5 Correct 256 ms 29752 KB Output is correct
6 Correct 244 ms 29048 KB Output is correct
7 Correct 225 ms 27852 KB Output is correct
8 Correct 268 ms 30392 KB Output is correct
9 Correct 253 ms 29752 KB Output is correct
10 Correct 243 ms 29112 KB Output is correct
11 Correct 226 ms 27796 KB Output is correct
12 Correct 215 ms 26760 KB Output is correct
13 Correct 214 ms 26548 KB Output is correct
14 Correct 202 ms 26004 KB Output is correct
15 Correct 189 ms 25008 KB Output is correct
16 Correct 147 ms 22360 KB Output is correct
17 Correct 144 ms 22072 KB Output is correct
18 Correct 138 ms 21612 KB Output is correct
19 Correct 135 ms 21408 KB Output is correct
20 Correct 131 ms 21216 KB Output is correct
21 Correct 129 ms 21108 KB Output is correct
22 Correct 141 ms 21276 KB Output is correct
23 Correct 145 ms 21172 KB Output is correct
24 Correct 136 ms 21136 KB Output is correct
25 Correct 146 ms 21116 KB Output is correct
26 Correct 149 ms 21152 KB Output is correct
27 Correct 146 ms 21052 KB Output is correct
28 Correct 141 ms 18012 KB Output is correct
29 Correct 146 ms 18052 KB Output is correct
30 Correct 138 ms 17936 KB Output is correct
31 Correct 143 ms 18000 KB Output is correct
32 Correct 148 ms 18048 KB Output is correct
33 Correct 161 ms 18056 KB Output is correct
34 Correct 172 ms 23352 KB Output is correct
35 Correct 139 ms 21424 KB Output is correct
36 Correct 115 ms 19636 KB Output is correct
37 Correct 194 ms 25776 KB Output is correct
38 Correct 192 ms 25620 KB Output is correct
39 Correct 185 ms 25140 KB Output is correct
40 Correct 184 ms 24836 KB Output is correct
41 Correct 179 ms 24576 KB Output is correct
42 Correct 149 ms 17976 KB Output is correct
43 Correct 208 ms 25832 KB Output is correct
44 Correct 206 ms 25780 KB Output is correct
45 Correct 195 ms 25508 KB Output is correct
46 Correct 201 ms 25312 KB Output is correct
47 Correct 34 ms 14412 KB Output is correct
48 Correct 33 ms 14336 KB Output is correct
49 Correct 36 ms 14380 KB Output is correct
50 Correct 33 ms 14424 KB Output is correct
51 Correct 34 ms 14420 KB Output is correct
52 Correct 34 ms 14416 KB Output is correct
53 Correct 34 ms 14412 KB Output is correct
54 Correct 34 ms 14408 KB Output is correct
55 Correct 33 ms 14412 KB Output is correct
56 Correct 34 ms 14404 KB Output is correct
57 Correct 36 ms 14412 KB Output is correct
58 Correct 34 ms 14416 KB Output is correct
59 Correct 34 ms 14424 KB Output is correct
60 Correct 33 ms 14420 KB Output is correct
61 Correct 34 ms 14376 KB Output is correct
62 Correct 34 ms 14412 KB Output is correct
63 Correct 34 ms 14436 KB Output is correct
64 Correct 34 ms 14412 KB Output is correct
65 Correct 34 ms 14428 KB Output is correct
66 Correct 35 ms 14420 KB Output is correct
67 Correct 36 ms 14424 KB Output is correct
68 Correct 33 ms 14432 KB Output is correct
69 Correct 34 ms 14404 KB Output is correct
70 Correct 32 ms 14412 KB Output is correct
71 Correct 35 ms 14412 KB Output is correct
72 Correct 35 ms 14412 KB Output is correct
73 Correct 33 ms 14412 KB Output is correct
74 Correct 37 ms 14688 KB Output is correct
75 Correct 37 ms 14688 KB Output is correct
76 Correct 37 ms 14684 KB Output is correct
77 Correct 36 ms 14588 KB Output is correct
78 Correct 37 ms 14664 KB Output is correct
79 Correct 37 ms 14516 KB Output is correct
80 Correct 36 ms 14540 KB Output is correct
81 Correct 40 ms 14944 KB Output is correct
82 Correct 40 ms 14916 KB Output is correct
83 Correct 39 ms 14916 KB Output is correct
84 Correct 38 ms 14520 KB Output is correct
85 Correct 44 ms 14816 KB Output is correct
86 Correct 39 ms 14812 KB Output is correct
87 Correct 38 ms 14788 KB Output is correct
88 Correct 38 ms 14548 KB Output is correct
89 Correct 37 ms 14756 KB Output is correct
90 Correct 37 ms 14688 KB Output is correct
91 Correct 38 ms 14676 KB Output is correct
92 Correct 36 ms 14580 KB Output is correct
93 Correct 36 ms 14688 KB Output is correct
94 Correct 36 ms 14688 KB Output is correct
95 Correct 36 ms 14676 KB Output is correct
96 Correct 37 ms 14516 KB Output is correct
97 Correct 37 ms 14660 KB Output is correct
98 Correct 35 ms 14660 KB Output is correct
99 Correct 35 ms 14684 KB Output is correct
100 Correct 36 ms 14548 KB Output is correct
101 Correct 39 ms 14660 KB Output is correct
102 Correct 39 ms 14660 KB Output is correct
103 Correct 37 ms 14664 KB Output is correct
104 Correct 38 ms 14684 KB Output is correct
105 Correct 39 ms 14676 KB Output is correct
106 Correct 40 ms 14684 KB Output is correct
107 Correct 38 ms 14692 KB Output is correct
108 Correct 37 ms 14688 KB Output is correct
109 Correct 38 ms 14660 KB Output is correct
110 Correct 37 ms 14668 KB Output is correct
111 Correct 182 ms 21176 KB Output is correct
112 Correct 179 ms 21172 KB Output is correct
113 Correct 184 ms 21144 KB Output is correct
114 Correct 187 ms 21208 KB Output is correct
115 Correct 182 ms 21176 KB Output is correct
116 Correct 200 ms 17976 KB Output is correct
117 Correct 204 ms 17936 KB Output is correct
118 Correct 363 ms 30360 KB Output is correct
119 Correct 377 ms 29328 KB Output is correct
120 Correct 250 ms 25548 KB Output is correct
121 Correct 215 ms 17976 KB Output is correct
122 Correct 297 ms 26852 KB Output is correct
123 Correct 295 ms 26200 KB Output is correct
124 Correct 278 ms 25596 KB Output is correct
125 Correct 217 ms 18044 KB Output is correct
126 Correct 216 ms 22284 KB Output is correct
127 Correct 212 ms 22156 KB Output is correct
128 Correct 198 ms 22068 KB Output is correct
129 Correct 228 ms 18044 KB Output is correct
130 Correct 197 ms 21244 KB Output is correct
131 Correct 196 ms 21244 KB Output is correct
132 Correct 185 ms 21148 KB Output is correct
133 Correct 217 ms 17996 KB Output is correct
134 Correct 182 ms 21132 KB Output is correct
135 Correct 179 ms 21116 KB Output is correct
136 Correct 168 ms 21152 KB Output is correct
137 Correct 194 ms 17976 KB Output is correct
138 Correct 182 ms 21000 KB Output is correct
139 Correct 176 ms 21008 KB Output is correct
140 Correct 130 ms 20944 KB Output is correct
141 Correct 201 ms 18132 KB Output is correct
142 Correct 259 ms 24696 KB Output is correct
143 Correct 263 ms 24700 KB Output is correct
144 Correct 256 ms 24792 KB Output is correct
145 Correct 242 ms 25060 KB Output is correct
146 Correct 259 ms 24888 KB Output is correct
147 Correct 232 ms 24612 KB Output is correct
148 Correct 240 ms 24484 KB Output is correct
149 Correct 228 ms 24336 KB Output is correct
150 Correct 237 ms 24248 KB Output is correct
151 Correct 204 ms 23556 KB Output is correct
152 Correct 127 ms 18048 KB Output is correct
153 Correct 245 ms 24928 KB Output is correct
154 Correct 236 ms 24828 KB Output is correct
155 Correct 245 ms 24760 KB Output is correct
156 Correct 233 ms 24500 KB Output is correct
157 Correct 233 ms 24392 KB Output is correct
158 Correct 235 ms 24204 KB Output is correct
159 Correct 224 ms 23588 KB Output is correct
160 Correct 126 ms 17968 KB Output is correct
161 Correct 256 ms 24548 KB Output is correct
162 Correct 251 ms 24316 KB Output is correct
163 Correct 235 ms 24208 KB Output is correct
164 Correct 235 ms 24004 KB Output is correct
165 Correct 232 ms 23932 KB Output is correct
166 Correct 143 ms 17984 KB Output is correct
167 Correct 210 ms 25968 KB Output is correct
168 Correct 202 ms 25684 KB Output is correct
169 Correct 206 ms 25508 KB Output is correct
170 Correct 214 ms 25356 KB Output is correct
171 Correct 198 ms 24736 KB Output is correct
172 Correct 191 ms 25816 KB Output is correct
173 Correct 264 ms 22020 KB Output is correct
174 Correct 269 ms 22144 KB Output is correct
175 Correct 251 ms 22116 KB Output is correct
176 Correct 218 ms 22356 KB Output is correct