Submission #430561

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
430561	2021-06-16 15:56:23	keko37	From Hacks to Snitches (BOI21_watchmen)	C++14	100 / 100	3001 ms	173708 KiB

watchmen

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#include<bits/stdc++.h>
using namespace std;
typedef long long llint;
typedef pair <int, int> pi;
const int MAXN = 250005;
const llint INF = 1000000000000000000LL;
int n, m, k;
int d[MAXN], ost[MAXN], koji[MAXN], prv[MAXN], nxt[MAXN];
llint best[MAXN], dist[3005][3005];
vector <pi> edges;
bool watched[MAXN];
vector <int> good, bad, sus_good[MAXN], sus_bad[MAXN];
void build () {
    for (int i = 1; i <= n; i++) {
        if (watched[i]) bad.push_back(i); else good.push_back(i);
    }
    for (int i = 0; i < bad.size(); i++) {
        koji[bad[i]] = i;
    }
    for (auto pp : edges) {
        int a = pp.first, b = pp.second;
        if (watched[b]) sus_bad[a].push_back(b); else sus_good[a].push_back(b);
        if (watched[a]) sus_bad[b].push_back(a); else sus_good[b].push_back(a);
    }
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

watchmen.cpp: In function 'void build()':
watchmen.cpp:23:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |     for (int i = 0; i < bad.size(); i++) {
      |                     ~~^~~~~~~~~~~~
watchmen.cpp: In function 'void dijkstra()':
watchmen.cpp:39:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |     for (int i = 0; i < bad.size(); i++) {
      |                     ~~^~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 25 / 25
• Subtask 6: 20 / 20
• Subtask 7: 20 / 20