Submission #305531

#TimeUsernameProblemLanguageResultExecution timeMemory
305531JustInCaseStations (IOI20_stations)C++17
0 / 100
918 ms1024 KiB
#include "stations.h" #include <vector> #include <iostream> #define int32_t int #define int64_t long long const int32_t MAX_N = 1000; struct Vertex { int32_t label; std::vector< int32_t > v; }; Vertex g[MAX_N + 5]; void dfs(int32_t u, int32_t &t, int32_t par, int32_t dep) { if(dep % 2 == 0) { g[u].label = t++; } for(auto &v : g[u].v) { if(v != par) { dfs(v, t, u, dep + 1); } } if(dep % 2 != 0) { g[u].label = t++; } } std::vector< int32_t > label(int32_t n, int32_t k, std::vector< int32_t > u, std::vector< int32_t > v) { for(int32_t i = 0; i < n; i++) { g[i].v.clear(); } for(int32_t i = 0; i < n - 1; i++) { g[u[i]].v.push_back(v[i]); g[v[i]].v.push_back(u[i]); } int32_t t = 0; dfs(0, t, -1, 0); std::vector< int32_t > labels(n); for(int32_t i = 0; i < n; i++) { labels[i] = g[i].label; } return labels; } int32_t find_next_station(int32_t s, int32_t t, std::vector< int32_t > c) { if(s < c[0]) { if(t > c[c.size() - 1]) { return c[c.size() - 1]; } if(t < s) { return c[c.size() - 1]; } else { for(int32_t i = 0; i < c.size() - 1; i++) { if(t > c[i] && t <= c[i + 1]) { return c[i + 1]; } } return c[0]; } } else { if(t <= c[0]) { return c[0]; } else if(t > s) { return c[0]; } else { for(int32_t i = 1; i < c.size() - 1; i++) { if(t >= c[i] && t < c[i + 1]) { return c[i]; } } return c[c.size() - 1]; } } }

Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:63:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |    for(int32_t i = 0; i < c.size() - 1; i++) {
      |                       ~~^~~~~~~~~~~~~~
stations.cpp:80:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   80 |    for(int32_t i = 1; i < c.size() - 1; i++) {
      |                       ~~^~~~~~~~~~~~~~
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