| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 1039484 | Trent | Spy 3 (JOI24_spy3) | C++17 | 274 ms | 8276 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "Aoi.h"
#include "bits/stdc++.h"
using namespace std;
#define forR(i, x) for(int i = 0; i < (x); ++i)
#define REP(i, a, b) for(int i = (a); i < (b); ++i)
#define all(x) x.begin(), x.end()
namespace {
typedef long long ll;
struct pii{int a, b;};
bool operator <(pii a, pii b) {return a.a < b.a || a.a == b.a && a.b < b.b;}
struct edge{int t; ll len;};
struct node{int i; ll to;};
bool operator <(node a, node b){
return a.to > b.to;
}
const ll INF = 1e17;
string toBinNumber(int x, int bits) {
string ret;
forR(i, bits) {
ret.push_back(x % 2 == 0 ? '0' : '1');
x /= 2;
}
reverse(all(ret));
assert(x == 0);
return ret;
}
}
std::string aoi(int N, int M, int Q, int K, std::vector<int> A,
std::vector<int> B, std::vector<long long> C,
std::vector<int> T, std::vector<int> X) {
vector<vector<edge>> adj(N);
map<pii, int> xi;
forR(i, M){
adj[A[i]].push_back({B[i], C[i]});
adj[B[i]].push_back({A[i], C[i]});
}
forR(i, K){
xi.insert({{A[X[i]], B[X[i]]}, i});
xi.insert({{B[X[i]], A[X[i]]}, i});
}
vector<int> indIn(K, Q);
vector<int> lOld(Q);
// dijkstra
forR(i, Q){
vector<ll> dis(N, INF);
vector<bool> vis(N);
vector<int> pre(N);
priority_queue<node> dij;
dij.push({0, 0});
dis[0] = 0;
while(!dij.empty()){
auto [cur, len] = dij.top();
dij.pop();
if(!vis[cur]){
vis[cur] = true;
for(auto [to, el] : adj[cur]){
if(len + el < dis[to]){
dis[to] = len + el;
pre[to] = cur;
dij.push({to, dis[to]});
}
}
}
}
vector<int> pth;
for(int j = T[i]; j != 0; j = pre[j]) pth.push_back(j);
pth.push_back(0);
reverse(all(pth));
int lasUsed = -1;
forR(j, (int) pth.size() - 1) {
if(xi.count({pth[j], pth[j+1]})) {
int eInd = xi[{pth[j], pth[j+1]}];
if(indIn[eInd] == Q) {
indIn[eInd] = i;
} else {
lasUsed = eInd;
}
}
}
lOld[i] = lasUsed == -1 ? -1 : lasUsed;
}
set<int> sUsedX;
for(int i : lOld) if(i != -1) {
sUsedX.insert(i);
}
vector<int> usedX;
for(int i : sUsedX) usedX.push_back(i);
for(int i : indIn) cerr << i << ' ';
cerr << '\n';
for(int i : lOld) cerr << i << ' ';
cerr << '\n';
for(int i : usedX) cerr << i << ' ';
cerr << '\n';
string ret;
forR(i, indIn.size()) {
if(!sUsedX.count(i)) ret += toBinNumber(indIn[i], 5);
else {
assert(indIn[i] + 1 < Q);
ret += toBinNumber(indIn[i] + Q + 1, 5);
}
}
assert(lOld[0] == -1);
REP(j, 1, lOld.size()){
if(lOld[j] == -1) ret += toBinNumber(usedX.size(), 4);
else {
bool found = false;
forR(k, usedX.size()) if(usedX[k] == lOld[j]) {
ret += toBinNumber(k, 4);
found = true;
break;
}
assert(found);
}
}
cerr << ret << '\n';
return ret;
}
#include "Bitaro.h"
#include "bits/stdc++.h"
using namespace std;
#define forR(i, x) for(int i = 0; i < (x); ++i)
#define REP(i, a, b) for(int i = (a); i < (b); ++i)
#define all(x) x.begin(), x.end()
namespace {
typedef long long ll;
struct pii{int a, b;};
bool operator <(pii a, pii b) {return a.a < b.a || a.a == b.a && a.b < b.b;}
struct edge{int t, ind; ll len;};
struct node{int i; ll to;};
bool operator <(node a, node b){
return a.to > b.to;
}
const ll INF = 1e17;
int fromBinNumber(string s) {
int ret = 0;
for(char i : s) ret = ret * 2 + (i == '0' ? 0 : 1);
return ret;
}
}
void bitaro(int N, int M, int Q, int K, std::vector<int> A, std::vector<int> B,
std::vector<long long> C, std::vector<int> T, std::vector<int> X,
std::string s) {
map<pii, int> xi;
forR(i, K){
xi.insert({{A[X[i]], B[X[i]]}, i});
xi.insert({{B[X[i]], A[X[i]]}, i});
}
vector<vector<edge>> adj(N);
map<pii, int> ei;
forR(i, M){
int cxi = -1;
if(xi.count({A[i], B[i]})){
cxi = xi[{A[i], B[i]}];
}
adj[A[i]].push_back({B[i], cxi, C[i]});
adj[B[i]].push_back({A[i], cxi, C[i]});
ei[{A[i], B[i]}] = i;
ei[{B[i], A[i]}] = i;
}
vector<int> indIn;
vector<int> lOld;
vector<int> usedX;
int ci=0;
forR(i, K) {
int val = fromBinNumber(s.substr(ci, 5));
if(val >= Q + 1) {
usedX.push_back(i);
indIn.push_back(val - Q - 1);
} else {
indIn.push_back(val);
}
ci += 5;
}
lOld.push_back(-1);
REP(j, 1, Q) {
int val = fromBinNumber(s.substr(ci, 4));
if(val == usedX.size()) lOld.push_back(-1);
else {
lOld.push_back(usedX[val]);
}
ci += 4;
}
for(int i : indIn) cerr << i << ' ';
cerr << '\n';
for(int i : lOld) cerr << i << ' ';
cerr << '\n';
for(int i : usedX) cerr << i << ' ';
cerr << '\n';
vector<bool> solid(N, false);
vector<int> sPre(N);
forR(i, Q){
vector<ll> dis(N, INF);
vector<bool> vis(N);
vector<int> pre(N);
int stNode;
if(lOld[i] == -1) stNode = 0;
else {
int eInd = X[lOld[i]];
stNode = sPre[A[eInd]] == B[eInd] ? A[eInd] : B[eInd];
assert(solid[stNode]);
}
priority_queue<node> dij;
dij.push({stNode, 0});
dis[stNode] = 0;
while(!dij.empty()){
auto [cur, len] = dij.top();
dij.pop();
if(!vis[cur]){
vis[cur] = true;
for(auto [to, ind, el] : adj[cur]){
if(ind == -1 || indIn[ind] == i){
el = ind == -1 ? el : 0;
if(len + el < dis[to]){
dis[to] = len + el;
pre[to] = cur;
dij.push({to, dis[to]});
}
}
}
}
}
vector<int> pth;
for(int j = T[i]; j != stNode; j = pre[j]) pth.push_back(j);
for(int j = stNode; j != 0; j = sPre[j]) pth.push_back(j);
pth.push_back(0);
reverse(all(pth));
for(int j : pth) cerr << j << ' ';
cerr << '\n';
REP(j, 1, pth.size()) {
solid[pth[j]] = true;
sPre[pth[j]] = pth[j-1];
}
vector<int> ret;
forR(j, (int) pth.size() - 1) ret.push_back(ei[{pth[j], pth[j+1]}]);
answer(ret);
}
}
Compilation message (stderr)
| # | Verdict | Execution time | Memory | Grader output |
|---|---|---|---|---|
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