bitaro.cpp: In function 'int main()':
bitaro.cpp:26:44: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
26 | while (!pq.empty() && dp[i].size() <= k) {
| ~~~~~~~~~~~~~^~~~
bitaro.cpp:29:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
29 | while (ptr[y] < dp[y].size()) {
| ~~~~~~~^~~~~~~~~~~~~~
bitaro.cpp:14:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
14 | scanf("%d %d %d", &n, &m, &q);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
bitaro.cpp:16:22: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
16 | while (m--) scanf("%d %d", &x, &y), v[x].emplace_back(y), rev[y].emplace_back(x);
| ~~~~~^~~~~~~~~~~~~~~~~
bitaro.cpp:39:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
39 | scanf("%d %d", &t, &r);
| ~~~~~^~~~~~~~~~~~~~~~~
bitaro.cpp:41:31: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
41 | for (auto &e: c) scanf("%d", &e), f[e] = 1;
| ~~~~~^~~~~~~~~~