Compilare: main.cpp: In function 'int main()': main.cpp:21:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t i = 0; i < N; i++) { ~~^~~ main.cpp:24:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t i = 0; i < N; i++) { ~~^~~ main.cpp:27:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t i = 0; i < N; i++) { ~~^~~ main.cpp:30:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t i = 0; i < N + 1; i++) { ~~^~~~~~~ main.cpp:34:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t i = 0; i < N + 1; i++) { ~~^~~~~~~ main.cpp:20:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%lld %lld", &N, &K); ^ main.cpp:22:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", vals + i); ^