#include <bits/stdc++.h> using namespace std; pair<int, int> Data[100010]; int main(void) { int N, i, j; scanf("%d", &N); for(i=0;i<N;i++) { int sm, sd, lm, ld; scanf("%d %d %d %d", &sm, &sd, &lm, &ld); Data[i].first = sm * 100 + sd; Data[i].second = lm * 100 + ld; } sort(Data, Data+N); int date = 301, flag, temp, ans; i=-1; flag = temp = ans = 0; while(date <= 1130 && i < N) { flag = 0; i++; for(j=i;j<N;j++) { if(Data[j].first > date) { break; } if(temp < Data[j].second) { temp = Data[j].second; flag = 1; i = j; } } if(flag) { date = temp; ans++; } else { printf("0\n"); return 0; } } printf("%d\n", ans); return 0; }

flower.cpp: In function 'int main()':
flower.cpp:9:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &N);
     ~~~~~^~~~~~~~~~
flower.cpp:13:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d %d %d", &sm, &sd, &lm, &ld);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~