Compilare: main.cpp: In function 'int main()': main.cpp:151:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("adunare2.in","r",stdin); ^ main.cpp:152:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("adunare2.out","w",stdout); ^ main.cpp:154:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n",&n,&q); ^ main.cpp:162:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d",&i,&j,&c); ^ main.cpp: In constructor 'SegmentTree::SegmentTree(int)': main.cpp:114:38: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(tmp + 1,NMAX + 5,stdin); ^ main.cpp:119:38: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(tmp + 1,NMAX + 5,stdin); ^ main.cpp:124:38: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(tmp + 1,NMAX + 5,stdin); ^