#include <stdio.h>
#define MAX 1000
int main() {
    double time[MAX], voltage[MAX];
    int count = 0;
    while (scanf("%lf,%lf", &time[count], &voltage[count]) == 2 && count < MAX) {
        count++;
    }
    double peak_voltage = voltage[0];
    double peak_time = time[0];
    for (int i = 1; i < count; i++) {
        if (voltage[i] > peak_voltage) {
            peak_voltage = voltage[i];
            peak_time = time[i];
        }       }
    printf("ピーク電位: %.3f V\n", peak_voltage);
    printf("ピーク時刻: %.3f 秒\n", peak_time);
    return 0;
}
 

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