Compilare: main.cpp: In function 'void show()': main.cpp:101:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<n*4;i++){ ~^~~~ main.cpp:104:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<n*4;i++){ ~^~~~ main.cpp: In function 'int main()': main.cpp:110:44: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("sequencequery.in", "r", stdin); ^ main.cpp:111:46: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("sequencequery.out", "w", stdout); ^ main.cpp:114:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%u%u", &n, &m); ^ main.cpp:116:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i]); ^ main.cpp:125:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%u %u", &x, &y); ^