oj.uz

Submission #132257

# Submission time Handle Problem Language Result Execution time Memory
132257 2019-07-18T15:19:34 Z gs14004 Wild Boar (JOI18_wild_boar) C++17
12 / 100
 211 ms 223932 KB 
#include <bits/stdc++.h>
using namespace std;
const int MAXN = 2005;
const int MAXL = 100005;
using lint = long long;
using pi = pair<lint, int>;

struct edg{
	int pos, idx, cost;
};

struct node{
	int pos, num;
	lint cost;
	int from;
	bool operator<(const node &n)const{
		return cost > n.cost;
	}
};

int n, m, q, l;
vector<edg> gph[MAXN];
lint dist[MAXN * 2][MAXN * 2];

struct path_info{
	int midl, midr;
	lint cost;
	bool operator<(const path_info &p)const{
		return cost < p.cost;
	}
};

vector<path_info> plist[MAXN][MAXN];
int ed[MAXN * 2], cost[MAXN * 2];

void preprocess(){
	for(int i=0; i<m; i++){
		int s, e, x; scanf("%d %d %d",&s,&e,&x);
		ed[2 * i] = e; ed[2 * i + 1] = s;
		cost[2 * i] = cost[2 * i + 1] = x;
		gph[s].push_back({e, i*2, x});
		gph[e].push_back({s, i*2+1, x});
	}
	memset(dist, 0x3f, sizeof(dist));
	for(int i=0; i<2*m; i++){
		dist[i][i] = cost[i];
		priority_queue<pi, vector<pi>, greater<pi> > pq;
		pq.emplace(cost[i], i);
		while(!pq.empty()){
			auto x = pq.top(); pq.pop();
			if(dist[i][x.second] != x.first) continue;
			for(auto &j : gph[ed[x.second]]){
				if((j.idx ^ x.second) == 1) continue;
				if(dist[i][j.idx] > x.first + j.cost){
					dist[i][j.idx] = x.first + j.cost;
					pq.emplace(dist[i][j.idx], j.idx);
				}
			}
		}
	}
	for(int i=1; i<=n; i++){
		for(int j=1; j<=n; j++){
			if(i != j){
				vector<path_info> pth;
				for(auto &k : gph[i]){
					for(auto &l : gph[j]){
						lint cost = dist[k.idx][l.idx ^ 1];
						pth.push_back({k.pos, l.pos, cost});
					}
				}
				sort(pth.begin(), pth.end());
				if(pth.size() <= 2){
					plist[i][j] = pth;
					continue;
				}
				plist[i][j].push_back(pth[0]);
				plist[i][j].push_back(pth[1]);
				if(pth[0].midl != pth[1].midl && pth[0].midr != pth[1].midr){
					plist[i][j].push_back(pth[2]);
					pi nxt_punkty = pi(-1, -1);
					if(pi(pth[0].midl, pth[1].midr) == pi(pth[2].midl, pth[2].midr)){
						nxt_punkty = pi(pth[1].midl, pth[0].midr);
					}
					else if(pi(pth[1].midl, pth[0].midr) == pi(pth[2].midl, pth[2].midr)){
						nxt_punkty = pi(pth[0].midl, pth[1].midr);
					}
					else if(pth[2].midl == pth[1].midl){
						nxt_punkty = pi(pth[2].midl, pth[0].midr);
					}
					else if(pth[2].midl == pth[0].midl){
						nxt_punkty = pi(pth[2].midl, pth[1].midr);
					}
					else if(pth[2].midr == pth[1].midr){
						nxt_punkty = pi(pth[0].midl, pth[2].midr);
					}
					else if(pth[2].midr == pth[0].midr){
						nxt_punkty = pi(pth[1].midl, pth[2].midr);
					}
					for(int k = 3; k < pth.size(); k++){
						plist[i][j].push_back(pth[k]);
						if(nxt_punkty != pi(pth[k].midl, pth[k].midr)){
							break;
						}
					}
				}
				else if(pth[0].midl == pth[1].midl){
					for(int x = 0; x < pth.size(); x++){
						if(pth[x].midl != pth[0].midl){
							plist[i][j].push_back(pth[x]);
							for(int y = x + 1; y < pth.size(); y++){
								if(pi(pth[0].midl, pth[x].midr) != pi(pth[y].midl, pth[y].midr)){
									plist[i][j].push_back(pth[y]);
									break;
								}
							}
							break;
						}
					}
				}
				else if(pth[0].midr == pth[1].midr){
					for(int x = 0; x < pth.size(); x++){
						if(pth[x].midr != pth[0].midr){
							plist[i][j].push_back(pth[x]);
							for(int y = x + 1; y < pth.size(); y++){
								if(pi(pth[x].midl, pth[0].midr) != pi(pth[y].midl, pth[y].midr)){
									plist[i][j].push_back(pth[y]);
									break;
								}
							}
							break;
						}
					}
				}
				else assert(0);
			//	for(auto &k : plist[i][j]) printf("(%d -> %d), (%d -> %d), %lld\n", i, k.midl, k.midr, j, k.cost);
			}
		}
	}
}

int a[MAXL];
lint dp[MAXL][4];

int main(){
	scanf("%d %d %d %d",&n,&m,&q,&l);
	preprocess();
	for(int i=0; i<l; i++) scanf("%d",&a[i]);
	for(int i=0; i<q; i++){
		int x, v; scanf("%d %d",&x,&v);
		x--;
		a[x] = v;
		memset(dp, 0x3f, sizeof(dp));
		for(int k=0; k<plist[a[0]][a[1]].size(); k++){
			dp[1][k] = plist[a[0]][a[1]][k].cost;
		}
		for(int k=2; k<l; k++){
			for(int x = 0; x < plist[a[k - 2]][a[k - 1]].size(); x++){
				for(int y = 0; y < plist[a[k - 1]][a[k]].size(); y++){
					if(plist[a[k - 2]][a[k - 1]][x].midr != plist[a[k - 1]][a[k]][y].midl){
						dp[k][y] = min(dp[k][y], dp[k - 1][x] + plist[a[k - 1]][a[k]][y].cost);
					}
				}
			}
		}
		int w = plist[a[l - 2]][a[l - 1]].size();
		lint dap = *min_element(dp[l - 1], dp[l - 1] + w);
		if(dap > 9e17) dap = -1;
		printf("%lld\n", dap);
	}
}

Compilation message

wild_boar.cpp: In function 'void preprocess()':
wild_boar.cpp:99:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for(int k = 3; k < pth.size(); k++){
                     ~~^~~~~~~~~~~~
wild_boar.cpp:107:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for(int x = 0; x < pth.size(); x++){
                     ~~^~~~~~~~~~~~
wild_boar.cpp:110:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
        for(int y = x + 1; y < pth.size(); y++){
                           ~~^~~~~~~~~~~~
wild_boar.cpp:121:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for(int x = 0; x < pth.size(); x++){
                     ~~^~~~~~~~~~~~
wild_boar.cpp:124:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
        for(int y = x + 1; y < pth.size(); y++){
                           ~~^~~~~~~~~~~~
wild_boar.cpp: In function 'int main()':
wild_boar.cpp:153:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int k=0; k<plist[a[0]][a[1]].size(); k++){
                ~^~~~~~~~~~~~~~~~~~~~~~~~~
wild_boar.cpp:157:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int x = 0; x < plist[a[k - 2]][a[k - 1]].size(); x++){
                   ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
wild_boar.cpp:158:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int y = 0; y < plist[a[k - 1]][a[k]].size(); y++){
                    ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
wild_boar.cpp: In function 'void preprocess()':
wild_boar.cpp:38:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   int s, e, x; scanf("%d %d %d",&s,&e,&x);
                ~~~~~^~~~~~~~~~~~~~~~~~~~~
wild_boar.cpp: In function 'int main()':
wild_boar.cpp:145:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d %d %d",&n,&m,&q,&l);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
wild_boar.cpp:147:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=0; i<l; i++) scanf("%d",&a[i]);
                         ~~~~~^~~~~~~~~~~~
wild_boar.cpp:149:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   int x, v; scanf("%d %d",&x,&v);
             ~~~~~^~~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 192 ms 223864 KB Output is correct
2 Correct 193 ms 223860 KB Output is correct
3 Correct 194 ms 223788 KB Output is correct
4 Correct 190 ms 223804 KB Output is correct
5 Correct 192 ms 223736 KB Output is correct
6 Correct 193 ms 223864 KB Output is correct
7 Correct 190 ms 223864 KB Output is correct
8 Correct 196 ms 223932 KB Output is correct
9 Correct 193 ms 223736 KB Output is correct
10 Correct 194 ms 223860 KB Output is correct
11 Correct 193 ms 223864 KB Output is correct
12 Correct 191 ms 223868 KB Output is correct
13 Correct 191 ms 223864 KB Output is correct
14 Correct 211 ms 223736 KB Output is correct
15 Correct 194 ms 223784 KB Output is correct
16 Correct 195 ms 223812 KB Output is correct
17 Correct 195 ms 223864 KB Output is correct
18 Correct 192 ms 223736 KB Output is correct
19 Correct 196 ms 223896 KB Output is correct
20 Correct 190 ms 223864 KB Output is correct
21 Correct 194 ms 223736 KB Output is correct
22 Correct 192 ms 223736 KB Output is correct
23 Correct 191 ms 223736 KB Output is correct
24 Correct 192 ms 223864 KB Output is correct
25 Correct 194 ms 223864 KB Output is correct

Subtask #2
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 192 ms 223864 KB Output is correct
2 Correct 193 ms 223860 KB Output is correct
3 Correct 194 ms 223788 KB Output is correct
4 Correct 190 ms 223804 KB Output is correct
5 Correct 192 ms 223736 KB Output is correct
6 Correct 193 ms 223864 KB Output is correct
7 Correct 190 ms 223864 KB Output is correct
8 Correct 196 ms 223932 KB Output is correct
9 Correct 193 ms 223736 KB Output is correct
10 Correct 194 ms 223860 KB Output is correct
11 Correct 193 ms 223864 KB Output is correct
12 Correct 191 ms 223868 KB Output is correct
13 Correct 191 ms 223864 KB Output is correct
14 Correct 211 ms 223736 KB Output is correct
15 Correct 194 ms 223784 KB Output is correct
16 Correct 195 ms 223812 KB Output is correct
17 Correct 195 ms 223864 KB Output is correct
18 Correct 192 ms 223736 KB Output is correct
19 Correct 196 ms 223896 KB Output is correct
20 Correct 190 ms 223864 KB Output is correct
21 Correct 194 ms 223736 KB Output is correct
22 Correct 192 ms 223736 KB Output is correct
23 Correct 191 ms 223736 KB Output is correct
24 Correct 192 ms 223864 KB Output is correct
25 Correct 194 ms 223864 KB Output is correct
26 Incorrect 192 ms 223876 KB Output isn't correct
27 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 192 ms 223864 KB Output is correct
2 Correct 193 ms 223860 KB Output is correct
3 Correct 194 ms 223788 KB Output is correct
4 Correct 190 ms 223804 KB Output is correct
5 Correct 192 ms 223736 KB Output is correct
6 Correct 193 ms 223864 KB Output is correct
7 Correct 190 ms 223864 KB Output is correct
8 Correct 196 ms 223932 KB Output is correct
9 Correct 193 ms 223736 KB Output is correct
10 Correct 194 ms 223860 KB Output is correct
11 Correct 193 ms 223864 KB Output is correct
12 Correct 191 ms 223868 KB Output is correct
13 Correct 191 ms 223864 KB Output is correct
14 Correct 211 ms 223736 KB Output is correct
15 Correct 194 ms 223784 KB Output is correct
16 Correct 195 ms 223812 KB Output is correct
17 Correct 195 ms 223864 KB Output is correct
18 Correct 192 ms 223736 KB Output is correct
19 Correct 196 ms 223896 KB Output is correct
20 Correct 190 ms 223864 KB Output is correct
21 Correct 194 ms 223736 KB Output is correct
22 Correct 192 ms 223736 KB Output is correct
23 Correct 191 ms 223736 KB Output is correct
24 Correct 192 ms 223864 KB Output is correct
25 Correct 194 ms 223864 KB Output is correct
26 Incorrect 192 ms 223876 KB Output isn't correct
27 Halted 0 ms 0 KB -

Subtask #4
0 / 38.0

# Verdict Execution time Memory Grader output
1 Correct 192 ms 223864 KB Output is correct
2 Correct 193 ms 223860 KB Output is correct
3 Correct 194 ms 223788 KB Output is correct
4 Correct 190 ms 223804 KB Output is correct
5 Correct 192 ms 223736 KB Output is correct
6 Correct 193 ms 223864 KB Output is correct
7 Correct 190 ms 223864 KB Output is correct
8 Correct 196 ms 223932 KB Output is correct
9 Correct 193 ms 223736 KB Output is correct
10 Correct 194 ms 223860 KB Output is correct
11 Correct 193 ms 223864 KB Output is correct
12 Correct 191 ms 223868 KB Output is correct
13 Correct 191 ms 223864 KB Output is correct
14 Correct 211 ms 223736 KB Output is correct
15 Correct 194 ms 223784 KB Output is correct
16 Correct 195 ms 223812 KB Output is correct
17 Correct 195 ms 223864 KB Output is correct
18 Correct 192 ms 223736 KB Output is correct
19 Correct 196 ms 223896 KB Output is correct
20 Correct 190 ms 223864 KB Output is correct
21 Correct 194 ms 223736 KB Output is correct
22 Correct 192 ms 223736 KB Output is correct
23 Correct 191 ms 223736 KB Output is correct
24 Correct 192 ms 223864 KB Output is correct
25 Correct 194 ms 223864 KB Output is correct
26 Incorrect 192 ms 223876 KB Output isn't correct
27 Halted 0 ms 0 KB -