Compilare: main.cpp: In function 'void join(int, int, int)': main.cpp:55:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<arbint[left].size() && j<arbint[right].size()){ ~^~~~~~~~~~~~~~~~~~~~ main.cpp:55:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<arbint[left].size() && j<arbint[right].size()){ ~^~~~~~~~~~~~~~~~~~~~~ main.cpp:65:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<arbint[left].size()){ ~^~~~~~~~~~~~~~~~~~~~ main.cpp:69:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j<arbint[right].size()){ ~^~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:113:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] { freopen("zoo.in", "r", stdin); ^ main.cpp:114:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("zoo.out", "w", stdout); ^ main.cpp:116:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ main.cpp:118:42: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &oi[i].x, &oi[i].y); ^ main.cpp:121:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &m); ^ main.cpp:123:74: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &que[i].x1, &que[i].y1, &que[i].x2, &que[i].y2); ^