Compilare: main.cpp: In function 'bool ok(long long int)': main.cpp:94:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<event>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 94 | while (i < e.size()) { | ~~^~~~~~~~~~ main.cpp:96:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<event>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 96 | while (j < e.size() && e[i].x == e[j].x) { | ~~^~~~~~~~~~ main.cpp:114:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<event>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 114 | if (j == e.size()) | ~~^~~~~~~~~~~ main.cpp:93:6: warning: unused variable 'cnt' [-Wunused-variable] 93 | ll cnt = 0, len = 2 * k + 1; | ^~~ main.cpp:93:15: warning: unused variable 'len' [-Wunused-variable] 93 | ll cnt = 0, len = 2 * k + 1; | ^~~