Compilare: main.cpp: In function 'int main()': main.cpp:12:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < N; i++) { ~~^~~ main.cpp:20:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < N; i++) { ~~^~~ main.cpp:21:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i; j < N; j++) { ~~^~~ main.cpp:10:28: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fp, "%u %u", &N,&K); ^ main.cpp:13:26: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fp, "%u", v + i); ^ main.cpp:16:30: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("nane.out", "w", fp); ^