oj.uz

Submission #703631

# Submission time Handle Problem Language Result Execution time Memory
703631 2023-02-27T21:49:06 Z kinope From Hacks to Snitches (BOI21_watchmen) C++14
15 / 100
 6000 ms 329948 KB 
#include <bits/stdc++.h>
#define ff first
#define ss second
using namespace std;
typedef pair<int, int> pii;
struct info{
		int x, k, mod;
		info(){}
		info(int x, int k, int mod) : x(x), k(k), mod(mod) {}
};
int main(){
		int n, m, a, b; scanf("%d%d", &n, &m);
		vector<vector<int>> g(n+1);
		for(int i = 0; i < m; ++i) scanf("%d%d", &a, &b), g[a].emplace_back(b), g[b].emplace_back(a);
		int k; scanf("%d", &k);
		vector<pii> ktcykl(n+1);
		vector<int> sz(k+1); sz[0] = 1;
		vector<vector<vector<int>>> dp(n+1);
		for(int i = 1; i <= n; ++i) dp[i].resize(k+1);
		for(int i = 1; i <= n; ++i) dp[i][0].emplace_back(2e09);
		for(int i = 1; i <= k; ++i){
				scanf("%d", &b), sz[i] = b;
				for(int j = 1; j <= n; ++j) dp[j][i].resize(b, 2e09);
				for(int j = 0; j < b; ++j) scanf("%d", &a), ktcykl[a] = pii(i, j);
		}
		queue<info> q;
		for(int i = 0; i <= k; ++i) q.emplace(1, i, 0), dp[1][i][0] = 0;
		while(!q.empty()){
				info x = q.front(); q.pop();
				int odl = dp[x.x][x.k][x.mod];
				//printf("%d %d %d: %d\n", x.x, x.k, x.mod, dp[x.x][x.k][x.mod]);
				if(!ktcykl[x.x].ff){
						for(int u : g[x.x]){
								//printf("%d %d\n", x.x, u);
								if(!ktcykl[u].ff) for(int i = 0; i <= k; ++i){ if(dp[u][i][(odl+1)%sz[i]] > odl+1) q.emplace(u, i, (odl+1)%sz[i]), dp[u][i][(odl+1)%sz[i]] = odl+1;}
								else if(ktcykl[u].ss != (odl+1)%sz[ktcykl[u].ff]) for(int i = 0; i <= k; ++i) if(dp[u][i][(odl+1)%sz[i]] > odl+1) q.emplace(u, i, (odl+1)%sz[i]), dp[u][i][(odl+1)%sz[i]] = odl+1;
						}
						if(dp[x.x][x.k][(x.mod+1)%sz[x.k]] > odl+1) q.emplace(x.x, x.k, (x.mod+1)%sz[x.k]), dp[x.x][x.k][(x.mod+1)%sz[x.k]] = odl+1;
				}
				else{
						for(int u : g[x.x]){
								if(ktcykl[x.x].ff != ktcykl[u].ff){
										if(!ktcykl[u].ff) for(int i = 0; i <= k; ++i){ if(dp[u][i][(odl+1)%sz[i]] > odl+1) q.emplace(u, i, (odl+1)%sz[i]), dp[u][i][(odl+1)%sz[i]] = odl+1;}
										else if(ktcykl[u].ss != (odl+1)%sz[ktcykl[u].ff]) for(int i = 0; i <= k; ++i) if(dp[u][i][(odl+1)%sz[i]] > odl+1) q.emplace(u, i, (odl+1)%sz[i]), dp[u][i][(odl+1)%sz[i]] = odl+1;
								}
								else{
										if(ktcykl[u].ss == (odl+1)%sz[ktcykl[u].ff] || (ktcykl[x.x].ss == (odl+1)%sz[ktcykl[u].ff] && ktcykl[u].ss == odl%sz[ktcykl[u].ff])){/*printf("!!%d %d %d: %d   %d %d\n", x.x, x.k, x.mod, u, ktcykl[x.x].ss, ktcykl[u].ss); */continue;}
										else for(int i = 0; i <= k; ++i) if(dp[u][i][(odl+1)%sz[i]] > odl+1) q.emplace(u, i, (odl+1)%sz[i]), dp[u][i][(odl+1)%sz[i]] = odl+1;
								}
						}
						if(ktcykl[x.x].ss != (odl+1)%sz[ktcykl[x.x].ff] && dp[x.x][x.k][(x.mod+1)%sz[x.k]] > odl+1) q.emplace(x.x, x.k, (x.mod+1)%sz[x.k]), dp[x.x][x.k][(x.mod+1)%sz[x.k]] = odl+1;
				}
		}
		int wynik = 2e09;
		for(int i = 0; i <= k; ++i)
				for(int j = 0; j < sz[i]; ++j) wynik = min(wynik, dp[n][i][j]);
		
		if(wynik == 2e09) printf("impossible\n");
		else printf("%d\n", wynik);
		
		return 0;
}

Compilation message

watchmen.cpp: In function 'int main()':
watchmen.cpp:12:24: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |   int n, m, a, b; scanf("%d%d", &n, &m);
      |                   ~~~~~^~~~~~~~~~~~~~~~
watchmen.cpp:14:35: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |   for(int i = 0; i < m; ++i) scanf("%d%d", &a, &b), g[a].emplace_back(b), g[b].emplace_back(a);
      |                              ~~~~~^~~~~~~~~~~~~~~~
watchmen.cpp:15:15: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |   int k; scanf("%d", &k);
      |          ~~~~~^~~~~~~~~~
watchmen.cpp:22:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |     scanf("%d", &b), sz[i] = b;
      |     ~~~~~^~~~~~~~~~
watchmen.cpp:24:37: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |     for(int j = 0; j < b; ++j) scanf("%d", &a), ktcykl[a] = pii(i, j);
      |                                ~~~~~^~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 249 ms 1976 KB Output is correct
2 Correct 926 ms 69552 KB Output is correct
3 Correct 1824 ms 63144 KB Output is correct
4 Correct 2666 ms 63492 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 2109 ms 63240 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 271 ms 1972 KB Output is correct
2 Correct 948 ms 69580 KB Output is correct
3 Correct 1730 ms 63144 KB Output is correct
4 Correct 2775 ms 63588 KB Output is correct
5 Correct 2 ms 340 KB Output is correct
6 Correct 2056 ms 63224 KB Output is correct
7 Correct 1326 ms 64704 KB Output is correct
8 Correct 1349 ms 69020 KB Output is correct
9 Correct 2077 ms 87560 KB Output is correct
10 Correct 1854 ms 65176 KB Output is correct
11 Correct 2297 ms 88304 KB Output is correct
12 Correct 1822 ms 66476 KB Output is correct

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 271 ms 1972 KB Output is correct
2 Correct 948 ms 69580 KB Output is correct
3 Correct 1730 ms 63144 KB Output is correct
4 Correct 2775 ms 63588 KB Output is correct
5 Correct 2 ms 340 KB Output is correct
6 Correct 2056 ms 63224 KB Output is correct
7 Correct 1326 ms 64704 KB Output is correct
8 Correct 1349 ms 69020 KB Output is correct
9 Correct 2077 ms 87560 KB Output is correct
10 Correct 1854 ms 65176 KB Output is correct
11 Correct 2297 ms 88304 KB Output is correct
12 Correct 1822 ms 66476 KB Output is correct
13 Correct 256 ms 1876 KB Output is correct
14 Correct 967 ms 69548 KB Output is correct
15 Correct 1767 ms 63132 KB Output is correct
16 Correct 2585 ms 63472 KB Output is correct
17 Correct 2 ms 340 KB Output is correct
18 Correct 2013 ms 63348 KB Output is correct
19 Correct 1300 ms 64704 KB Output is correct
20 Correct 1355 ms 69188 KB Output is correct
21 Correct 2125 ms 87556 KB Output is correct
22 Correct 1795 ms 65176 KB Output is correct
23 Correct 2279 ms 88308 KB Output is correct
24 Correct 1847 ms 66504 KB Output is correct
25 Execution timed out 6030 ms 316904 KB Time limit exceeded
26 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 271 ms 1972 KB Output is correct
2 Correct 948 ms 69580 KB Output is correct
3 Correct 1730 ms 63144 KB Output is correct
4 Correct 2775 ms 63588 KB Output is correct
5 Correct 2 ms 340 KB Output is correct
6 Correct 2056 ms 63224 KB Output is correct
7 Correct 1326 ms 64704 KB Output is correct
8 Correct 1349 ms 69020 KB Output is correct
9 Correct 2077 ms 87560 KB Output is correct
10 Correct 1854 ms 65176 KB Output is correct
11 Correct 2297 ms 88304 KB Output is correct
12 Correct 1822 ms 66476 KB Output is correct
13 Correct 256 ms 1876 KB Output is correct
14 Correct 967 ms 69548 KB Output is correct
15 Correct 1767 ms 63132 KB Output is correct
16 Correct 2585 ms 63472 KB Output is correct
17 Correct 2 ms 340 KB Output is correct
18 Correct 2013 ms 63348 KB Output is correct
19 Correct 1300 ms 64704 KB Output is correct
20 Correct 1355 ms 69188 KB Output is correct
21 Correct 2125 ms 87556 KB Output is correct
22 Correct 1795 ms 65176 KB Output is correct
23 Correct 2279 ms 88308 KB Output is correct
24 Correct 1847 ms 66504 KB Output is correct
25 Execution timed out 6030 ms 316904 KB Time limit exceeded
26 Halted 0 ms 0 KB -

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 249 ms 1976 KB Output is correct
2 Correct 926 ms 69552 KB Output is correct
3 Correct 1824 ms 63144 KB Output is correct
4 Correct 2666 ms 63492 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 2109 ms 63240 KB Output is correct
7 Correct 271 ms 1972 KB Output is correct
8 Correct 948 ms 69580 KB Output is correct
9 Correct 1730 ms 63144 KB Output is correct
10 Correct 2775 ms 63588 KB Output is correct
11 Correct 2 ms 340 KB Output is correct
12 Correct 2056 ms 63224 KB Output is correct
13 Correct 1326 ms 64704 KB Output is correct
14 Correct 1349 ms 69020 KB Output is correct
15 Correct 2077 ms 87560 KB Output is correct
16 Correct 1854 ms 65176 KB Output is correct
17 Correct 2297 ms 88304 KB Output is correct
18 Correct 1822 ms 66476 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 248 ms 1972 KB Output is correct
23 Correct 979 ms 69552 KB Output is correct
24 Correct 1962 ms 63192 KB Output is correct
25 Correct 2781 ms 63488 KB Output is correct
26 Correct 2 ms 340 KB Output is correct
27 Correct 2233 ms 63268 KB Output is correct
28 Correct 1362 ms 64696 KB Output is correct
29 Correct 1376 ms 69020 KB Output is correct
30 Correct 2102 ms 87560 KB Output is correct
31 Correct 1992 ms 65300 KB Output is correct
32 Correct 2396 ms 88408 KB Output is correct
33 Correct 1861 ms 66472 KB Output is correct
34 Execution timed out 6052 ms 329948 KB Time limit exceeded
35 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 249 ms 1976 KB Output is correct
2 Correct 926 ms 69552 KB Output is correct
3 Correct 1824 ms 63144 KB Output is correct
4 Correct 2666 ms 63492 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 2109 ms 63240 KB Output is correct
7 Correct 271 ms 1972 KB Output is correct
8 Correct 948 ms 69580 KB Output is correct
9 Correct 1730 ms 63144 KB Output is correct
10 Correct 2775 ms 63588 KB Output is correct
11 Correct 2 ms 340 KB Output is correct
12 Correct 2056 ms 63224 KB Output is correct
13 Correct 1326 ms 64704 KB Output is correct
14 Correct 1349 ms 69020 KB Output is correct
15 Correct 2077 ms 87560 KB Output is correct
16 Correct 1854 ms 65176 KB Output is correct
17 Correct 2297 ms 88304 KB Output is correct
18 Correct 1822 ms 66476 KB Output is correct
19 Correct 256 ms 1876 KB Output is correct
20 Correct 967 ms 69548 KB Output is correct
21 Correct 1767 ms 63132 KB Output is correct
22 Correct 2585 ms 63472 KB Output is correct
23 Correct 2 ms 340 KB Output is correct
24 Correct 2013 ms 63348 KB Output is correct
25 Correct 1300 ms 64704 KB Output is correct
26 Correct 1355 ms 69188 KB Output is correct
27 Correct 2125 ms 87556 KB Output is correct
28 Correct 1795 ms 65176 KB Output is correct
29 Correct 2279 ms 88308 KB Output is correct
30 Correct 1847 ms 66504 KB Output is correct
31 Execution timed out 6030 ms 316904 KB Time limit exceeded
32 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 249 ms 1976 KB Output is correct
2 Correct 926 ms 69552 KB Output is correct
3 Correct 1824 ms 63144 KB Output is correct
4 Correct 2666 ms 63492 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 2109 ms 63240 KB Output is correct
7 Correct 271 ms 1972 KB Output is correct
8 Correct 948 ms 69580 KB Output is correct
9 Correct 1730 ms 63144 KB Output is correct
10 Correct 2775 ms 63588 KB Output is correct
11 Correct 2 ms 340 KB Output is correct
12 Correct 2056 ms 63224 KB Output is correct
13 Correct 1326 ms 64704 KB Output is correct
14 Correct 1349 ms 69020 KB Output is correct
15 Correct 2077 ms 87560 KB Output is correct
16 Correct 1854 ms 65176 KB Output is correct
17 Correct 2297 ms 88304 KB Output is correct
18 Correct 1822 ms 66476 KB Output is correct
19 Correct 256 ms 1876 KB Output is correct
20 Correct 967 ms 69548 KB Output is correct
21 Correct 1767 ms 63132 KB Output is correct
22 Correct 2585 ms 63472 KB Output is correct
23 Correct 2 ms 340 KB Output is correct
24 Correct 2013 ms 63348 KB Output is correct
25 Correct 1300 ms 64704 KB Output is correct
26 Correct 1355 ms 69188 KB Output is correct
27 Correct 2125 ms 87556 KB Output is correct
28 Correct 1795 ms 65176 KB Output is correct
29 Correct 2279 ms 88308 KB Output is correct
30 Correct 1847 ms 66504 KB Output is correct
31 Execution timed out 6030 ms 316904 KB Time limit exceeded
32 Halted 0 ms 0 KB -